Term ends Jul 28, 2038 · Medium confidence
20-year base term ends Oct 20, 2036
Why Medium: A parent in the chain could not be resolved.
Held by Celcuity Inc.
Filed Apr 11, 2018 as application 15/950,739 · Granted Feb 28, 2023
Base term plus 646 days of patent term adjustment (USPTO delay)
Today
2016
2038
Clock starts
Oct 20, 2016
Oct 20, 2016
Term ends
Jul 28, 2038
Jul 28, 2038
Granted
Feb 28, 2023
Feb 28, 2023
base term
patent term adjustment
fee events
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
646
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
3
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 646 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is paid so far. Confidence: Medium. 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 Oct 20, 2016, when application PCT/US2016/057923, the earliest non-provisional in its chain, was filed (this one was filed Apr 11, 2018); a parent in its chain could not be resolved (the next row) | Oct 20, 2036 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +646 days, USPTO patent term adjustment record | Jul 28, 2038 | 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jul 28, 2038 | Medium confidence |
This family
| US 11,591,573 | this patent Jul 2038 | Jul 2038 |
| US 12,215,356 | In force no later than Jan 2037 | no later than Jan 2037 |
2 of 3 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 |
|---|---|---|---|
| Jun 11, 2018 Reel 46047, frame 682 | Laing, Lance Gavin; Rich, Ben; Dandapat, Abhijit | Celcuity LLC | Assignment of Assignor's Interest |
| Oct 26, 2018 Reel 47353, frame 985 | Celcuity LLC | Celcuity Inc. | Change of Name |
| Apr 8, 2021 Reel 55867, frame 237 | Celcuity, Inc. | Innovatus Life Sciences Lending Fund I, LP | Security Interest |
| May 30, 2024 Reel 67572, frame 1 | Celcuity, Inc. | Innovatus Life Sciences Lending Fund I, LP, as Collateral Agent | Amended and Restated Intellectual Property Security Agreement |
| Sep 9, 2025 Reel 72886, frame 984 | Celcuity Inc. | Oxford Finance LLC, as Collateral Agent | Second Amended and Restated Intellectual Property Security Agreement |
| Jun 8, 2026 Reel 74883, frame 538 | Innovatus Life Sciences Lending Fund I, LP | Celcuity Inc. | Release of Security Interest |
| Jun 8, 2026 Reel 74883, frame 775 | Oxford Finance LLC | Celcuity Inc. | Release of Security 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
Jul 2038
Term ends Jul 28, 2038. Maintenance fees still fall due before then
Note
The 646 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
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.