Term ends Mar 19, 2028 · High confidence
20-year base term ends Mar 19, 2028
Held by Ambrx, Inc.
Filed Feb 2, 2021 as application 17/165,351 · Granted May 28, 2024
Base term plus 584 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2008
2028
Clock starts
Mar 19, 2008
Mar 19, 2008
Term ends
Mar 19, 2028
Mar 19, 2028
Granted
May 28, 2024
May 28, 2024
base term
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
584
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 10,377,805, US 10,961,291, US 8,012,931, US 8,383,365, US 9,079,971.
None due
Maintenance fees
This term ends before the first maintenance fee's grace period does, 4 years from grant, so no fee can end it early.
8
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 584 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. No maintenance fee can end this term early. 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 Mar 19, 2008, when application 12/051,830, the earliest non-provisional in its chain, was filed (this one was filed Feb 2, 2021) | Mar 19, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +584 days, USPTO patent term adjustment record | Oct 24, 2029 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,377,805, US 10,961,291, US 8,012,931, US 8,383,365, US 9,079,971) | capped to Mar 19, 2028 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | No maintenance fee can end the term early | In force | High confidence |
| Computed term end | The steps above, in order | Mar 19, 2028 | High confidence |
This family
| US 8,012,931 | In force Mar 2028 | Mar 2028 |
| US 8,383,365 | In force Mar 2028 | Mar 2028 |
| US 9,079,971 | In force Mar 2028 | Mar 2028 |
| US 9,517,273 | In force Mar 2028 | Mar 2028 |
| US 9,975,936 | Lapsed on the fee record May 2026 | May 2026 |
| US 10,377,805 | In force Mar 2028 | Mar 2028 |
| US 10,961,291 | In force Mar 2028 | Mar 2028 |
| US 11,993,637 | this patent Mar 2028 | Mar 2028 |
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 |
|---|---|---|---|
| Nov 20, 2024 Reel 69405, frame 730 | Cujec, Thomas P.; Mariani, Roberto; Hays Putnam, Anna-maria A.; Keefe, William M.; Knudsen, Nick; Ho, Lillian; Pinkstaff, Jason; Kraynov, Vadim | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Mar 2028
Term ends Mar 19, 2028. No further fees fall due before then
Note
The 584 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 10,377,805, US 10,961,291, US 8,012,931, US 8,383,365, US 9,079,971.
Citations
1
later US patent cites this one
Fewer than half of the utility patents granted in 2024 in our data have been cited yet, so we show the count and do not rank on it.
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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.