Term ends no later than Sep 28, 2038 · Low confidence
20-year base term ends Sep 15, 2036
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Held by Circlesx LLC
Filed Jan 3, 2019 as application 16/239,485 · Granted Dec 9, 2025
Base term plus 743 days of patent term adjustment (USPTO delay)
Today
2016
2038
Clock starts
Sep 15, 2016
Sep 15, 2016
Ends no later than
Sep 28, 2038
Sep 28, 2038
Granted
Dec 9, 2025
Dec 9, 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
743
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
116
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 743 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 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 Sep 15, 2016, when application 15/266,326, the earliest non-provisional in its chain, was filed (this one was filed Jan 3, 2019); a parent in its chain could not be resolved (the next row) | Sep 15, 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 | +743 days, USPTO patent term adjustment record | Sep 28, 2038 | 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 | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than Sep 28, 2038 | Low confidence |
This family
| US 11,138,827 | In force Dec 2037 | Dec 2037 |
| US 10,460,520 | In force Nov 2037 | Nov 2037 |
| US 12,039,585 | In force Dec 2039 | Dec 2039 |
| US 12,124,976 | In force no later than Jul 2040 | no later than Jul 2040 |
| US 11,810,023 | In force May 2040 | May 2040 |
| US 11,861,527 | In force no later than Aug 2041 | no later than Aug 2041 |
| US 12,493,831 | this patent no later than Sep 2038 | no later than Sep 2038 |
| Application 16/242,981 | Abandoned not computed | not computed |
8 of 116 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 |
|---|---|---|---|
| May 20, 2019 Reel 49235, frame 761 | Simpson, Erik | Simpson Holdings, Inc. | Assignment of Assignor's Interest |
| May 28, 2019 Reel 49296, frame 704 | Simpson Holdings, Inc. | Simpsx Technologies LLC | Assignment of Assignor's Interest |
| Nov 25, 2021 Reel 58251, frame 180 | Simpsx Technologies LLC | Circlesx 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.
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Alerts on its grants, lapses and transfers.
What's changing
Sep 2038
Term ends no later than Sep 28, 2038. Maintenance fees still fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 743 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Sep 28, 2038. We will not guess the cap.
Citations
18
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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.