Term ends Oct 20, 2035 · High confidence
20-year base term ends Aug 28, 2035
Held by Chdi Foundation, Inc.
Filed Aug 5, 2022 as application 17/881,895 · Granted Mar 25, 2025
Base term plus 131 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2015
2035
Clock starts
Aug 28, 2015
Aug 28, 2015
Term ends
Oct 20, 2035
Oct 20, 2035
Granted
Mar 25, 2025
Mar 25, 2025
base term
patent term adjustment
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
131
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 10,479,802.
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 131 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 Aug 28, 2015, when application PCT/US2015/047407, the earliest non-provisional in its chain, was filed (this one was filed Aug 5, 2022) | Aug 28, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +131 days, USPTO patent term adjustment record | Jan 6, 2036 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,479,802) | capped to Oct 20, 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 20, 2035 | High confidence |
This family
| Application PCT/US2015/047407 | PCT application no patent term | no patent term |
| US 10,479,802 | In force Oct 2035 | Oct 2035 |
| US 11,059,836 | In force no later than Aug 2035 | no later than Aug 2035 |
| Application 17/325,038 | Abandoned not computed | not computed |
| Application 17/558,397 | Abandoned not computed | not computed |
| US 12,258,355 | this patent Oct 2035 | Oct 2035 |
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 |
|---|---|---|---|
| Sep 20, 2024 Reel 68650, frame 523 | Dominguez, Celia; Wityak, John; Bard, Jonathan; Kiselyov, Alex | Chdi Foundation, Inc. | Assignment of Assignor's Interest |
| Sep 20, 2024 Reel 68650, frame 597 | Brown, Christopher John; Galan, Sébastien René Gabriel; Prime, Michael Edward; Giles, Paul Richard; Gadouleau, Elise Lucienne Paulette; Krülle, Thomas Martin; Clark-frew, Daniel; Johnson, Peter David; Coe, Samuel; Hayes, Sarah | Evotec (UK) Ltd. | Assignment of Assignor's Interest |
| Sep 20, 2024 Reel 68650, frame 605 | Evotec (UK) Ltd. | Chdi Foundation, Inc. | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Oct 2035
Term ends Oct 20, 2035. Maintenance fees still fall due before then
Note
The 131 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 10,479,802.
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
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.