Collateral for a security interest recorded Feb 17, 2026 (Rvibc Lender LLC).
Term ends Jul 15, 2036 · High confidence
20-year base term ends Jul 15, 2036
Held by Kymab Limited
Filed Apr 6, 2017 as application 15/480,525 · Granted Mar 31, 2020
Base term plus 301 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2016
2036
Clock starts
Jul 15, 2016
Jul 15, 2016
Term ends
Jul 15, 2036
Jul 15, 2036
Granted
Mar 31, 2020
Mar 31, 2020
base term
fee events
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
301
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 9,567,399.
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.
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 301 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 1 of 3 maintenance fees is 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 Jul 15, 2016, when application 15/211,504, the earliest non-provisional in its chain, was filed (this one was filed Apr 6, 2017) | Jul 15, 2036 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +301 days, USPTO patent term adjustment record | May 12, 2037 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,567,399) | capped to Jul 15, 2036 | 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 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 | this patent Jul 2036 | Jul 2036 |
| US 9,957,323 | In force Jul 2036 | Jul 2036 |
| US 11,858,996 | In force 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 |
|---|---|---|---|
| Apr 6, 2017 Reel 42176, frame 134 | Campbell, Jamie; Gillies, Stephen D.; Sandy Nee Waddell, Nikole; Van Krinks, Cassandra; Arkinstall, Steve; Germaschewski, Volker; Kirby, Ian; Kosmac, Miha; Gallagher, Thomas | Kymab Limited | Assignment of Assignor's Interest |
| Feb 17, 2026 Reel 74878, frame 973 | Immunobrain Checkpoint, Inc. | Rvibc Lender LLC | 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 2036
Term ends Jul 15, 2036. Maintenance fees still fall due before then
Note
The 301 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 9,567,399.
Citations
52
later US patents cite this one
That is top 5% of utility patents granted in 2020 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.