Term ends Apr 26, 2038 · Low confidence
20-year base term ends Apr 26, 2038
Held by Interblock D.O.O.
Filed Dec 15, 2023 as application 18/541,277 · Granted Oct 28, 2025
Base term plus 79 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2018
2038
Clock starts
Apr 26, 2018
Apr 26, 2018
Term ends
Apr 26, 2038
Apr 26, 2038
Granted
Oct 28, 2025
Oct 28, 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
79
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 11,423,745, US 11,887,441.
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.
5
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 79 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: 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 26, 2018, when application 15/963,922, the earliest non-provisional in its chain, was filed (this one was filed Dec 15, 2023); a parent in its chain could not be resolved (the next row) | Apr 26, 2038 | 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 | +79 days, USPTO patent term adjustment record | Jul 14, 2038 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 11,423,745, US 11,887,441) | capped to Apr 26, 2038 | 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: 17889072, 17163158 | Low confidence overall | Low confidence |
| Computed term end | The steps above, in order | Apr 26, 2038 | Low confidence |
This family
| US 10,540,853 | In force Apr 2038 | Apr 2038 |
| US 10,922,927 | In force Apr 2038 | Apr 2038 |
| US 11,423,745 | In force Apr 2038 | Apr 2038 |
| US 11,887,441 | In force Apr 2038 | Apr 2038 |
| US 12,456,354 | this patent Apr 2038 | Apr 2038 |
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 |
|---|---|---|---|
| Dec 15, 2023 Reel 65882, frame 679 | Interblock USA L.C. | Interblock D.O.O. | 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
Apr 2038
Term ends Apr 26, 2038. Maintenance fees still fall due before then
Note
The 79 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 11,423,745, US 11,887,441.
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.