Term ends Oct 19, 2035 · High confidence
20-year base term ends Oct 19, 2035
Held by Anavex Life Sciences Corp.
Filed May 18, 2023 as application 18/320,159 · Granted Apr 7, 2026
Base term plus 244 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2015
2035
Clock starts
Oct 19, 2015
Oct 19, 2015
Term ends
Oct 19, 2035
Oct 19, 2035
Granted
Apr 7, 2026
Apr 7, 2026
base term
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
244
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 10,813,907, US 11,690,821.
0 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
6
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 244 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 0 of 2 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 Oct 19, 2015, when application PCT/US2015/056172, the earliest non-provisional in its chain, was filed (this one was filed May 18, 2023) | Oct 19, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +244 days, USPTO patent term adjustment record | Jun 19, 2036 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,813,907, US 11,690,821) | capped to Oct 19, 2035 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 19, 2035 | High confidence |
This family
| Application PCT/US2015/056172 | PCT application no patent term | no patent term |
| US 10,441,563 | In force Oct 2035 | Oct 2035 |
| US 10,813,907 | In force Oct 2035 | Oct 2035 |
| US 11,690,821 | In force Oct 2035 | Oct 2035 |
| US 12,594,256 | this patent Oct 2035 | Oct 2035 |
| Application 19/568,331 | Pending not computed | not computed |
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 |
|---|---|---|---|
| May 19, 2023 Reel 63703, frame 271 | Missling, Christopher U.; Durrant, Cameron | Anavex Life Sciences Corp. | 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
Oct 2035
Term ends Oct 19, 2035. Maintenance fees still fall due before then
Note
The 244 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 10,813,907, US 11,690,821.
Citations
We have no citation count for this patent yet. That is not the same as never having been cited.
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.