Term ends Mar 23, 2039 · High confidence
20-year base term ends Dec 12, 2038
Held by Quantum Designed Materials Ltd.
Filed Apr 19, 2023 as application 18/136,837 · Granted Sep 8, 2026
Base term plus 672 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2018
2039
Clock starts
Dec 12, 2018
Dec 12, 2018
Term ends
Mar 23, 2039
Mar 23, 2039
Granted
Sep 8, 2026
Sep 8, 2026
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
672
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 11,683,997.
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.
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 672 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Dec 12, 2018, when application PCT/IB2018/001574, the earliest non-provisional in its chain, was filed (this one was filed Apr 19, 2023) | Dec 12, 2038 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +672 days, USPTO patent term adjustment record | Oct 14, 2040 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 11,683,997) | capped to Mar 23, 2039 | 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 | Mar 23, 2039 | High confidence |
This family
| US 11,683,997 | In force Mar 2039 | Mar 2039 |
| US 12,733,409 | this patent Mar 2039 | Mar 2039 |
| Application 19/730,373 | Pending not computed | not computed |
| Application 19/730,238 | Pending not computed | not computed |
| Application 19/730,398 | Pending not computed | not computed |
5 of 6 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 |
|---|---|---|---|
| Sep 16, 2024 Reel 68592, frame 82 | Gatt, Refael, DR. | Quantum Designed Materials Ltd. | 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
Mar 2039
Term ends Mar 23, 2039. Maintenance fees still fall due before then
Note
The 672 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 11,683,997.
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.