Term ends Apr 1, 2045 · Low confidence
20-year base term ends Apr 1, 2045
Held by Park City Bio, LLC
Filed Aug 27, 2025 as application 19/311,344 · Granted Mar 10, 2026
Base term, 20 years from filing
Today
2025
2045
Clock starts
Apr 1, 2025
Apr 1, 2025
Term ends
Apr 1, 2045
Apr 1, 2045
Granted
Mar 10, 2026
Mar 10, 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 12,564,560, to Apr 1, 2045. 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.
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 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: Low. 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 1, 2025, when application PCT/US2025/022435, the earliest non-provisional in its chain, was filed (this one was filed Aug 27, 2025); a parent in its chain could not be resolved (the next row) | Apr 1, 2045 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 12,564,560) | resolves to Apr 1, 2045, 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 |
| Further caveats on record | The record names parents not resolved: PCTUS2025022435 | Low confidence overall | Low confidence |
| Computed term end | The steps above, in order | Apr 1, 2045 | Low confidence |
This family
| Application PCT/US2025/022435 | PCT application no patent term | no patent term |
| US 12,564,560 | In force Apr 2045 | Apr 2045 |
| US 12,570,602 | this patent Apr 2045 | Apr 2045 |
| Application 19/453,321 | Pending not computed | not computed |
| Application 19/456,123 | Pending not computed | not computed |
| Application 19/529,419 | Pending not computed | not computed |
| Application PCT/US2026/018754 | PCT application no patent term | no patent term |
| Application 19/644,875 | 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 |
|---|---|---|---|
| Oct 9, 2025 Reel 72523, frame 193 | Forest, Jeremy | Kuleon LLC | Assignment of Assignor's Interest |
| Oct 9, 2025 Reel 72523, frame 221 | Kuleon LLC | Park City Bio, LLC | 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.
What's changing
Apr 2045
Term ends Apr 1, 2045. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 12,564,560, 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.