What happens after you file a provisional patent? (The 12-month countdown)

You filed. The USPTO Patent Center returned an application number, you paid your $65, and the confirmation email sits in your inbox. What now? The honest answer: a 12-month clock just started and most solo inventors don't plan for it. This post is the post-filing playbook — the milestones that matter, the decisions waiting at T+12mo, and the mistakes that quietly kill priority-date inheritance.

The clock starts the moment you file

A provisional application expires exactly 12 months from the filing date. There is no extension — no “pending”, no grace period past day 365. On day 366, if you haven't converted to a non-provisional (or a PCT international application), the priority date is gone. Any competitor who filed a provisional on day 365 + 1 now has a better claim to your invention.

Your filing receipt from the USPTO shows the filing date — write it down. That date + 12 months is your deadline. The USPTO does not send a reminder. It is entirely on you.

What “patent pending” actually gives you

During the 12-month window you get three specific things:

1. The right to say “patent pending” on marketing, pitch decks, product packaging, and to potential investors. This signals that your IP is in motion. It is not legal protection — it's a professional-intent signal.
2. A priority date for US novelty purposes. If a competitor independently files a patent on the same invention after your provisional filing date, their application loses to yours on §102 (novelty) — provided your provisional actually enables the claims.
3. Disclosure protection under §102(b) for 12 months. You can publish, show, or sell the invention without waiving US patentability, as long as you file the non-provisional (or abandon) within the year. Foreign filing is different — many jurisdictions have no grace period, so any public disclosure can be fatal.

It does NOT give you:

• The right to sue. A provisional is not examined and does not issue — you cannot enforce against infringers during the pendency. All you can say is “we'll sue you once the non-provisional issues.”
• Foreign protection. Provisionals are US-only. If you want EU, JP, CN, KR, a PCT international application has to be filed within the 12 months (and then national- stage applications follow 30 months later).
• A guaranteed patent. The examiner still has to accept the non-provisional's claims. ~55% of non-provisional applications issue — the other 45% end in final rejection.

The timeline that actually matters

Work backwards from T+12mo and the key milestones look like this:

• T+0 (filing day): Keep the filing receipt somewhere you'll actually find it. Add the T+12mo deadline to every calendar + reminder system you use. If you use 50search's /manage portfolio, we track this automatically and send reminders at 90, 60, 30, and 7 days before expiration.
• T+3 months: Decide whether you're going to file the non- provisional at all. If the invention has been de-scoped, pivoted, or commercialised under a different approach, this is the right time to let it lapse. Waiting until T+11mo to decide costs you planning time.
• T+6 months: Start the non-provisional drafting if you haven't. A full-service patent attorney needs ~4–8 weeks from retainer to filing for a moderately complex invention; don't start the relationship at T+10mo.
• T+9 months: Draft should be in attorney review. Prior-art search should be refreshed (new art can emerge in a year — what was novel at T+0 might not be at T+9mo).
• T+11 months: File the non-provisional. Leaves one month of buffer for USPTO system issues, identity verification delays, fee-calculation surprises. Do not file on T+11mo 29 days — one USPTO outage and you lose everything.

The three paths at T+12mo

You have exactly three options when the deadline arrives:

1. File a non-provisional. The standard path. Claim priority back to the provisional filing date. USPTO micro-entity fees: $400 basic + $40 search + $100 examination + $100 issue (if it issues) — roughly $640 in USPTO fees, plus attorney time (typically $3,000–$7,000 for a moderately complex invention) or DIY.
2. File a PCT international application. Same priority date, 30-month window to nationalise in each country. Only worth it if you actually plan to file abroad — PCT fees run $2,000–$4,000 before national-stage fees.
3. Let it lapse. Do nothing. The priority date expires. Your invention is now in the public domain for US patentability purposes (if you disclosed it publicly under the §102(b) grace period). This is the correct choice if you've decided the invention isn't commercially worth the non-provisional fees.

The five mistakes we see most

• Forgetting the deadline. Number one killer. Calendar reminders in one system only, then the system changes, then the deadline passes. Use two reminder systems.
• Assuming priority inheritance is automatic. It isn't. Every claim in the non-provisional has to be fully supported by the provisional disclosure to inherit its date. If your non-provisional adds new material (e.g. a second embodiment you developed during the year), those new claims get the non- provisional filing date. See the enablement-trap section in the provisional-vs-non-provisional post.
• Publishing abroad during the 12 months. US §102(b) gives you a grace period. Most foreign jurisdictions don't. If you present at a conference or publish a paper during pendency and want to file in Europe later, you've waived European patentability.
• Not refreshing the prior-art search at T+9mo. A competitor may have filed or published in the intervening year. Refresh before the non- provisional — see the prior-art playbook.
• Waiting until T+11mo to engage an attorney. Every patent attorney we know has stories about desperate calls at T+11mo and 3 weeks. Attorneys have queues. Give them 8 weeks and you'll get better work done.

What /manage does for you

50search's portfolio dashboard tracks every filing you originate through us. For each provisional, we track the filing date, compute the T+12mo deadline, and send email reminders at 90 / 60 / 30 / 7 days out. You can add filings you drafted elsewhere too — paste the filing date and app number and we'll include them in the same dashboard.

The Pro tier at $29/month includes /manage tracking. It's the subscription version of “never forget a deadline.” If you're past your first provisional filing, it's the single most useful thing to add to your stack for year two.