Term ends Sep 13, 2036 · Low confidence
20-year base term ends Sep 13, 2036
Held by Rytec Corporation
Filed Jan 31, 2022 as application 17/589,540 · Granted Sep 2, 2025
Base term plus 474 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2016
2036
Clock starts
Sep 13, 2016
Sep 13, 2016
Term ends
Sep 13, 2036
Sep 13, 2036
Granted
Sep 2, 2025
Sep 2, 2025
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
474
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 10,619,397, US 11,236,540.
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.
7
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 474 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: 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 Sep 13, 2016, when application 15/264,179, the earliest non-provisional in its chain, was filed (this one was filed Jan 31, 2022); a parent in its chain could not be resolved (the next row) | Sep 13, 2036 | 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 | +474 days, USPTO patent term adjustment record | Dec 31, 2037 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,619,397, US 11,236,540) | capped to Sep 13, 2036 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 2 maintenance fees paid | In force | High confidence |
| Further caveats on record | The record names parents not resolved: 16847429, 15264179 | Low confidence overall | Low confidence |
| Computed term end | The steps above, in order | Sep 13, 2036 | Low confidence |
This family
| US 10,619,397 | In force Sep 2036 | Sep 2036 |
| Application PCT/US2016/051721 | PCT application no patent term | no patent term |
| US 11,236,540 | In force Sep 2036 | Sep 2036 |
| US 12,404,714 | this patent Sep 2036 | Sep 2036 |
| US 12,709,936 | In force Sep 2037 | Sep 2037 |
| Application 18/738,152 | Pending not computed | not computed |
| Application 19/743,878 | 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 |
|---|---|---|---|
| Feb 4, 2022 Reel 58886, frame 61 | Gregoriou, Daniel J. | Rytec Corporation | 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
Sep 2036
Term ends Sep 13, 2036. Maintenance fees still fall due before then
Note
The 474 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 10,619,397, US 11,236,540.
Citations
4
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.