Lapsed Apr 26, 2026 on the fee record · High confidence
20-year base term ends Aug 17, 2031
First maintenance fee unpaid; grace period ended.
Held by Ambrx, Inc.
Filed May 27, 2020 as application 16/884,639 · Granted Apr 26, 2022
Base term, 20 years from filing
Today
Lapsed Apr 26, 2026
2011
2031
Clock starts
Aug 17, 2011
Aug 17, 2011
No longer in force
Apr 26, 2026
Apr 26, 2026
Granted
Apr 26, 2022
Apr 26, 2022
Term would have run to
Aug 17, 2031
Aug 17, 2031
base term
after the term ends
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 10,253,083, US 10,751,391, US 9,567,386, US 9,962,450, to Aug 17, 2031. The term already ends on or before that date, so the cap shortened nothing.
0 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
12
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Aug 17, 2031: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Aug 17, 2011, when application 13/212,101, the earliest non-provisional in its chain, was filed (this one was filed May 27, 2020) | Aug 17, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,253,083, US 10,751,391, US 9,567,386, US 9,962,450) | resolves to Aug 17, 2031, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 2 maintenance fees paid | lapsed Apr 26, 2026 | High confidence |
| Computed term end | The steps above, in order | Apr 26, 2026 | High confidence |
This family
| US 8,735,539 | Lapsed on the fee record May 2026 | May 2026 |
| US 9,567,386 | In force Nov 2031 | Nov 2031 |
| US 9,452,222 | In force Aug 2031 | Aug 2031 |
| US 9,962,450 | Lapsed on the fee record May 2026 | May 2026 |
| US 10,253,083 | In force Aug 2031 | Aug 2031 |
| US 10,702,588 | In force Aug 2031 | Aug 2031 |
| US 10,751,391 | In force Aug 2031 | Aug 2031 |
| US 11,311,605 | this patent Apr 2026 | Apr 2026 |
8 of 12 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Jan 26, 2021 Reel 55032, frame 827 | Kraynov, Vadim; Knudsen, Nick; Hewet, Amha; De Dios, Kristine; Pinkstaff, Jason; Sullivan, Lorraine | Ambrx, Inc. | Assignment of Assignor's Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,253,083, US 10,751,391, US 9,567,386, US 9,962,450, ends no earlier than this term, so it caps nothing.
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2022 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.