Can you switch patent attorneys after filing a provisional patent application?

You filed a provisional patent application, but now the 12-month deadline is approaching — and you're not sure you want the same law firm or patent agency handling the non-provisional. Maybe the first firm charged more than you expected. Maybe the relationship didn't go well. Maybe you just want a second opinion before committing to the full application.

You are generally free to switch patent attorneys or patent agents before filing the non-provisional application. Using a new provider does not, by itself, affect the provisional filing date. What matters is claiming priority correctly and making sure the new provider has everything they need to prepare a careful application.

Here are some answers to common questions we hear about switching.

Can another patent attorney file your non-provisional application?

Yes. You do not need permission from the person who prepared the provisional application to hire a new registered patent attorney or patent agent for the next filing.

In many cases, there isn't even an active prosecution matter to transfer: provisional applications are not examined on their merits and ordinarily expire after 12 months. The new practitioner is preparing an original non-provisional application that claims the benefit of the earlier filing date.

That said, under some circumstances, there may still be administrative steps involved in changing providers. If the earlier provider is listed as counsel in a pending application or controls the USPTO correspondence address for an active matter, you may need to file a change of correspondence address or a revocation of power of attorney.

More commonly, the immediate task is simply obtaining a complete copy of what was filed and making sure the new provider knows the correct application number and deadline. Do not rely on a Word draft or email version of the provisional — the review needs to start with the document actually submitted to the USPTO.

What happens to your provisional filing date when you switch?

Switching patent attorneys or patent agents does not normally affect the filing date of your provisional application. The new provider can still file a non-provisional application that claims the benefit of the earlier provisional filing date, as long as:

• The non-provisional is filed within 12 months of the provisional filing date
• The claim to priority is made correctly in the non-provisional application
• At least one inventor named in the provisional is also named in the non-provisional

The new provider is not starting from zero. They are preparing a non-provisional application that incorporates and builds on the disclosure in the provisional. The priority date applies to any claim that finds adequate support in the provisional as filed.

What if the original provisional left out important details?

A new patent attorney or patent agent cannot go back and add missing technical information to a provisional application after it has been filed. The non-provisional application can include more detail and more refined claims, but only the features described in the provisional will receive the earlier filing date.

Features developed or added after the provisional filing date will have a later priority date. That does not necessarily mean the original filing is useless. The key question is which parts of the invention were actually described well enough in the provisional. Some claims in the non-provisional may receive the earlier date; others may not.

For example, suppose the provisional described a battery-management system that monitors temperature and adjusts charging behavior. If the team later develops a separate fault-prediction model using different sensor inputs, that improvement may not benefit from the provisional filing date — even if the non-provisional application covers it.

This is why the new provider needs to review the provisional as filed and identify any gaps before drafting the non-provisional. Depending on what is missing and how much time remains, the best approach may be to claim priority to the provisional for some aspects of the invention while treating other aspects as new matter with a later priority date.

The most common reasons a provisional ends up with coverage gaps are covered in our guide to provisional patent mistakes.

How much does it cost to switch patent attorneys?

There is not usually a separate fee simply for changing patent attorneys or patent agents. That said, providers often charge more to prepare a non-provisional application when the provisional was filed by someone else, because they need to review the existing filing before drafting the next one.

In particular, the price may increase when:

• Important information is missing. If the provisional contains only a high-level description, the new provider may need to conduct additional inventor interviews or rebuild parts of the invention disclosure before drafting the non-provisional.
• The invention has changed. New features, use cases, or technical improvements may need to be documented and distinguished from what was included in the original filing.
• The drawings need to be revised or replaced. Informal sketches or figures based on an outdated prototype may not be sufficient for the non-provisional application.
• The original strategy needs to be reconsidered. The new practitioner may recommend a different focus for the claims or identify subject matter that should be handled in a separate application.
• The deadline is close. An urgent takeover may require the new provider to rearrange other work or complete the review and drafting process on an accelerated schedule.
• You filed the provisional yourself. Because most inventors are not trained in patent drafting, self-filed provisionals often describe the product at a high level without enough technical detail, alternative embodiments, or claim-relevant distinctions from prior art.

Patentext charges a flat fee of $5,700 to draft and file a non-provisional application when the provisional was filed by another provider. USPTO filing fees are billed separately.

What will your new patent provider need?

You do not need to assemble a perfect transfer package before reaching out, but a complete record helps the practitioner spend less time tracking down documents and more time evaluating the application. Aim to provide:

• The provisional application as filed. Include the full specification, drawings, appendices, and USPTO filing receipt. Drafts can provide background, but the review needs to start with the version actually submitted.
• The filing details. Share the electronic acknowledgment receipt or official filing receipt from the USPTO. These documents give the new provider the application number, confirmation number, filing date, and the deadline for claiming priority.
• Materials from the original process. Send any invention disclosures, inventor notes, diagrams, prototypes, search results, or prior-art references used to prepare the provisional. The original engagement letter or fee agreement can also be useful context.
• An update on the invention. Explain what changed after filing, when the main developments occurred, and what the company now considers the most valuable part of the invention. This does not need to be a formal document — a brief summary or notes from the team are enough to start.
• Relevant disclosure dates. Include dates for launches, publications, demonstrations, sales activity, offers for sale, or other public disclosures, even if they occurred after the provisional application was filed.
• Inventor and ownership information. Provide the names of the people who contributed to the invention, along with any assignments and relevant employee or contractor agreements.

How late is too late to switch?

The earlier you switch, the more time the new provider has to review the provisional, understand how the invention has changed, and prepare a careful non-provisional application before the 12-month deadline.

That said, a close deadline does not necessarily mean you are stuck with the original provider. Patentext can typically prepare a non-provisional application in about a week once we have the necessary materials. If your deadline is approaching, reach out as soon as possible and provide the filing date upfront. Even when the timeline is tight, an early review can clarify what is realistic and prevent additional complications from waiting.

What should you ask before hiring a new provider?

Before switching, ask enough questions to understand who will handle the work, how the existing provisional will be evaluated, and what you will pay now and later.

• Which developments may not receive the provisional filing date? Ask how the provider will identify features added or developed after the original filing.
• What does the quoted fee include? Ask whether drawings, inventor interviews, revisions, patent searches, and USPTO filing fees are included or billed separately.
• How are office action responses handled and priced? The non-provisional filing fee is only one part of the potential cost, so ask how later USPTO work will be billed.
• Are there any public-disclosure or foreign-filing issues that require immediate attention? A close deadline or prior public activity may affect the available filing strategy.

What are some considerations if you filed the provisional application yourself?

You can still hire a patent attorney or patent agent to prepare the non-provisional application. The new provider will review the provisional just as they would review one filed by another firm: determining which aspects of the invention are described well enough to support claims, identifying what changed after filing, and deciding how to structure the non-provisional to capture as much value as possible.

A self-filed provisional is not automatically weak, but quality varies significantly. If it contains only a high-level summary, leaves out important technical detail, or does not clearly explain alternatives and variations, the new practitioner may need to conduct additional inventor interviews to fill in the gaps. In some cases, the most efficient path is to treat the self-filed provisional as a starting point and supplement it significantly in the non-provisional.

Thinking about switching before your non-provisional filing?

You are not locked into the provider who filed your provisional application. The important thing is to switch early enough for the new practitioner to review what was filed and prepare the non-provisional carefully.

Patentext can take over provisional applications filed elsewhere and prepare the non-provisional for a flat fee of $5,700, typically in about a week once we have the necessary materials. Explore Patentext Services.

Disclaimer: This article is for general informational purposes only and does not constitute legal advice. USPTO procedures and fee schedules change over time; verify current requirements before filing. If you have questions about a specific application, consult a registered patent attorney or patent agent.

Alexander FlakeCEO & co-founder, Patentext

Alex is the co-founder and CEO of Patentext. He has spent more than a decade preparing and prosecuting patent applications for startups, growth-stage companies, and technology companies including Uber and Dropbox.