Lapsed Feb 13, 2026 on the fee record · Medium confidence
20-year base term ends Jun 30, 2029
Why Medium: A terminal disclaimer is on file (approved) with no resolved reference, so the term may end earlier.
Second maintenance fee unpaid; grace period ended.
Held by Denovo Biopharma LLC
Filed Apr 22, 2016 as application 15/136,056 · Granted Feb 13, 2018
Base term, 20 years from filing
Today
Lapsed Feb 13, 2026
2009
2029
Clock starts
Jun 30, 2009
Jun 30, 2009
No longer in force
Feb 13, 2026
Feb 13, 2026
Granted
Feb 13, 2018
Feb 13, 2018
Term would have run to
Jun 30, 2029
Jun 30, 2029
base term
after the term ends
fee events
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.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
1 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.
5
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Jun 30, 2029: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. Confidence: Medium. 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 Jun 30, 2009, when application PCT/US2009/049322, the earliest non-provisional in its chain, was filed (this one was filed Apr 22, 2016) | Jun 30, 2029 | 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 on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 2 maintenance fees paid | lapsed Feb 13, 2026 | High confidence |
| Computed term end | The steps above, in order | Feb 13, 2026 | Medium confidence |
This family
| Application PCT/US2009/049322 | PCT application no patent term | no patent term |
| US 9,320,738 | In force Mar 2030 | Mar 2030 |
| US 9,889,133 | this patent Feb 2026 | Feb 2026 |
| US 10,449,194 | In force Jun 2029 | Jun 2029 |
| US 11,191,764 | Lapsed on the fee record Dec 2025 | Dec 2025 |
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 17, 2017 Reel 41287, frame 919 | Gruber, Harry E.; Jolly, Douglas J.; Olmstead, Kay | Tocagen Inc. | Assignment of Assignor's Interest |
| Nov 4, 2019 Reel 50909, frame 548 | Tocagen Inc. | Oxford Finance LLC, as Collateral Agent | Security Interest |
| Apr 23, 2020 Reel 52482, frame 439 | Oxford Finance LLC | Tocagen, Inc. | Release of Security Interest |
| Jul 13, 2020 Reel 53192, frame 140 | Tocagen Inc. | Denovo Biopharma 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
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Feb 13, 2026. We will not guess the cap.
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2018 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.