Term ends May 12, 2038 · High confidence
20-year base term ends Mar 11, 2035
Held by Cellectis
Filed Sep 21, 2018 as application 16/138,908 · Granted Nov 21, 2023
Base term plus 1336 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2015
2038
Clock starts
Mar 11, 2015
Mar 11, 2015
Term ends
May 12, 2038
May 12, 2038
Granted
Nov 21, 2023
Nov 21, 2023
base term
patent term adjustment
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
1,336
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 11,186,824.
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.
5
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 1336 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 11, 2015, when application PCT/EP2015/055097, the earliest non-provisional in its chain, was filed (this one was filed Sep 21, 2018) | Mar 11, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1336 days, USPTO patent term adjustment record | Nov 6, 2038 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 11,186,824) | capped to May 12, 2038 | 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 | May 12, 2038 | High confidence |
This family
| Application 15/123,974 | Abandoned not computed | not computed |
| US 11,820,996 | this patent May 2038 | May 2038 |
| US 12,252,699 | In force Mar 2035 | Mar 2035 |
| Application 19/067,358 | Pending not computed | not computed |
4 of 5 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
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
May 2038
Term ends May 12, 2038. Maintenance fees still fall due before then
Note
The 1336 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 11,186,824.
Citations
19
later US patents cite this one
That is top 5% 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.