Term ends Mar 18, 2041 · High confidence
20-year base term ends Mar 18, 2041
Held by Synlogic Operating Company, Inc.
Filed Jun 3, 2022 as application 17/832,487 · Granted Sep 26, 2023
Base term, 20 years from filing
Today
2021
2041
Clock starts
Mar 18, 2021
Mar 18, 2021
Term ends
Mar 18, 2041
Mar 18, 2041
Granted
Sep 26, 2023
Sep 26, 2023
base term
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
0 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
4
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 is its 20-year base term, with no adjustment for prosecution delay. 0 of 3 maintenance fees are paid so far. 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 18, 2021, when application PCT/US2021/023003, the earliest non-provisional in its chain, was filed (this one was filed Jun 3, 2022) | Mar 18, 2041 | 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 18, 2041 | High confidence |
This family
| Application PCT/US2021/023003 | PCT application no patent term | no patent term |
| US 11,766,463 | this patent Mar 2041 | Mar 2041 |
| US 12,171,790 | In force Mar 2041 | Mar 2041 |
| Application 18/941,023 | Pending not computed | not computed |
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 13, 2023 Reel 62370, frame 828 | Adolfsen, Kristin; Greisen, Per; Callihan, Isolde; Lawrence, Adam; Spoonamore, James; Konieczka, Jay | Zymergen Inc. | Assignment of Assignor's Interest |
| Jan 13, 2023 Reel 62370, frame 843 | Zymergen Inc. | Synlogic Operating Company, 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.
What's changing
Mar 2041
Term ends Mar 18, 2041. Maintenance fees still fall due before then
Citations
2
later US patents cite this one
That is above the median of utility patents granted in 2023 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.