Term ends Jul 15, 2036 · High confidence
20-year base term ends Aug 9, 2037
Held by Kymab Limited
Filed Feb 7, 2019 as application 16/323,980 · Granted Jan 2, 2024
Base term plus 459 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2017
2037
Clock starts
Aug 9, 2017
Aug 9, 2017
Term ends
Jul 15, 2036
Jul 15, 2036
Granted
Jan 2, 2024
Jan 2, 2024
base term
after the term ends
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
459
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 9,957,323.
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.
9
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 459 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 Aug 9, 2017, when application PCT/GB2017/052352, the earliest non-provisional in its chain, was filed (this one was filed Feb 7, 2019) | Aug 9, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +459 days, USPTO patent term adjustment record | Nov 11, 2038 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,957,323) | capped to Jul 15, 2036 | 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 | Jul 15, 2036 | High confidence |
This family
| US 9,567,399 | In force Jul 2036 | Jul 2036 |
| US 9,617,338 | In force Jul 2036 | Jul 2036 |
| US 10,604,576 | In force Jul 2036 | Jul 2036 |
| US 9,957,323 | In force Jul 2036 | Jul 2036 |
| US 11,858,996 | this patent Jul 2036 | Jul 2036 |
| Application 17/727,288 | Abandoned not computed | not computed |
| Application 17/727,309 | Pending not computed | not computed |
| Application 18/499,431 | Pending not computed | not computed |
8 of 9 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 |
|---|---|---|---|
| Sep 21, 2022 Reel 61166, frame 752 | Sainson, Richard Charles Alfred; Arkinstall, Stephen John; Campbell, Jamie Iain; Ali, Mohammed Hanif; Lee, E-chiang; McCourt, Matthew John; Germaschewski, Volker; Kirby, Ian; Kosmac, Miha | Kymab Limited | Assignment of Assignor's Interest |
| Sep 21, 2022 Reel 61166, frame 817 | Parveen, Nahida; Rowlands, Robert; Borhis, Gwenoline | Kymab Limited | Assignment of Assignor's Interest |
| Sep 22, 2022 Reel 61188, frame 217 | Parveen, Nahida; Rowlands, Robert; Borhis, Gwenoline | Kymab Limited | 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
Jul 2036
Term ends Jul 15, 2036. Maintenance fees still fall due before then
Note
The 459 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 9,957,323.
Citations
4
later US patents cite 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.