Term ends Aug 22, 2036 · High confidence
20-year base term ends May 11, 2035
Held by Verona Pharma Limited
Filed Nov 11, 2016 as application 15/310,693 · Granted Dec 15, 2020
Base term plus 469 days of patent term adjustment (USPTO delay)
Today
2015
2036
Clock starts
May 11, 2015
May 11, 2015
Term ends
Aug 22, 2036
Aug 22, 2036
Granted
Dec 15, 2020
Dec 15, 2020
base term
patent term adjustment
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
469
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 469 days past its 20-year base term on prosecution delay. 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 May 11, 2015, when application PCT/GB2015/051377, the earliest non-provisional in its chain, was filed (this one was filed Nov 11, 2016) | May 11, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +469 days, USPTO patent term adjustment record | Aug 22, 2036 | 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 | Aug 22, 2036 | High confidence |
This family
| US 10,864,213 | this patent Aug 2036 | Aug 2036 |
| US 11,759,467 | In force Dec 2035 | Dec 2035 |
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 |
|---|---|---|---|
| Feb 11, 2017 Reel 41231, frame 945 | Abbott-banner, Katharine; Hanrahan, John; Thomas, David | Verona Pharma PLC | Assignment of Assignor's Interest |
| May 13, 2024 Reel 67387, frame 799 | Verona Pharma PLC | Oaktree Fund Administration, LLC | Security Interest |
| Mar 25, 2025 Reel 70618, frame 561 | Oaktree Fund Administration, LLC, as Agent | Verona Pharma PLC | Release of Security Interest in Patents at R/F 067387/0799 |
| Oct 7, 2025 Reel 72495, frame 271 | Oaktree Fund Administration, LLC | Verona Pharma PLC | Release of Security Interest |
| Jan 21, 2026 Reel 74462, frame 69 | Verona Pharma PLC | Verona Pharma Limited | Change of Name |
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
Aug 2036
Term ends Aug 22, 2036. Maintenance fees still fall due before then
Note
The 469 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
15
later US patents cite this one
That is top 25% 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.