Term ends Apr 17, 2040 · High confidence
20-year base term ends Apr 17, 2040
Held by Compass Pathfinder Limited
Filed Aug 11, 2025 as application 19/296,581 · Granted Apr 28, 2026
Base term, 20 years from filing
Today
2020
2040
Clock starts
Apr 17, 2020
Apr 17, 2020
Term ends
Apr 17, 2040
Apr 17, 2040
Granted
Apr 28, 2026
Apr 28, 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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 12,377,112, to Apr 17, 2040. The term already ends on or before that date, so the cap shortened nothing.
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.
8
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 Apr 17, 2020, when application PCT/IB2020/053687, the earliest non-provisional in its chain, was filed (this one was filed Aug 11, 2025) | Apr 17, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 12,377,112) | resolves to Apr 17, 2040, no earlier than this term, so no change | 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 | Apr 17, 2040 | High confidence |
This family
| US 12,433,904 | In force Jul 2041 | Jul 2041 |
| US 11,564,935 | In force no later than Apr 2040 | no later than Apr 2040 |
| US 11,738,035 | In force Apr 2040 | Apr 2040 |
| US 11,865,126 | In force Apr 2040 | Apr 2040 |
| US 12,447,164 | In force Apr 2040 | Apr 2040 |
| US 12,611,418 | this patent Apr 2040 | Apr 2040 |
| US 12,751,960 | In force Apr 2040 | Apr 2040 |
7 of 8 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 |
|---|---|---|---|
| Nov 12, 2025 Reel 73545, frame 853 | Londesbrough, Derek John; Brown, Christopher; Northen, Julian Scott; Moore, Gillian; Patil, Hemant Kashinath; Nichols, David E.; Eriksson, Hans Ake; Goldsmith, George; Malievskaia, Ekaterina; Veraart, Manon Cecile Elisabeth; Wilde, Lars Christian | Compass Pathfinder 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
Apr 2040
Term ends Apr 17, 2040. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 12,377,112, ends no earlier than this term, so it caps nothing.
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.