Collateral for a security interest recorded Dec 2, 2024 (Twin Brook Capital Partners, LLC).
Lapsed Jan 2, 2026 on the fee record · Low confidence
20-year base term ends Oct 18, 2030
Second maintenance fee unpaid; grace period ended.
Held by Zonar Systems, Inc.
Filed Mar 12, 2014 as application 14/206,697 · Granted Jan 2, 2018
Base term, 20 years from filing, plus 259 days of patent term adjustment (USPTO delay)
Today
Lapsed Jan 2, 2026
2010
2031
Clock starts
Oct 18, 2010
Oct 18, 2010
No longer in force
Jan 2, 2026
Jan 2, 2026
Granted
Jan 2, 2018
Jan 2, 2018
Term would have run to
Jul 4, 2031
Jul 4, 2031
base term
patent term adjustment
after the term ends
fee events
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
259
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.
1 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.
10
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Jul 4, 2031: its 20-year base term plus 259 days of term adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 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 Oct 18, 2010, when application 12/906,615, the earliest non-provisional in its chain, was filed (this one was filed Mar 12, 2014); a parent in its chain could not be resolved (the next row) | Oct 18, 2030 | 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 | +259 days, USPTO patent term adjustment record | Jul 4, 2031 | 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 | 1 of 3 maintenance fees paid | lapsed Jan 2, 2026 | High confidence |
| Computed term end | The steps above, in order | Jan 2, 2026 | Low confidence |
This family
| Application 12/906,615 | Abandoned not computed | not computed |
| Application 14/204,962 | Abandoned not computed | not computed |
| US 9,815,681 | Lapsed on the fee record Nov 2025 | Nov 2025 |
| Application 14/206,646 | Abandoned not computed | not computed |
| US 9,856,129 | this patent Jan 2026 | Jan 2026 |
| US 9,828,233 | Lapsed on the fee record Nov 2025 | Nov 2025 |
| US 9,881,432 | Lapsed on the fee record Jan 2026 | Jan 2026 |
| US 10,489,998 | In force Aug 2031 | Aug 2031 |
8 of 10 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 |
|---|---|---|---|
| Nov 17, 2014 Reel 34274, frame 129 | Zonar Systems, Inc. | Bank Of America, N.a. | Patent Security Agreement |
| Dec 28, 2015 Reel 37367, frame 41 | McQuade, Charles Michael; Fadler, Rick; King, Michael Charles | Zonar Systems, Inc. | Assignment of Assignor's Interest |
| Oct 28, 2016 Reel 40512, frame 99 | Bank Of America, N.a. | Zonar Systems, Inc. | Release of Security Interest |
| Dec 2, 2024 Reel 69466, frame 630 | Zonar Systems, Inc. | Twin Brook Capital Partners, LLC, as Agent | Security 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
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 259 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 Jan 2, 2026. We will not guess the cap.
Citations
33
later US patents cite this one
That is top 10% of utility patents granted in 2018 in our data, the only group it is compared against.
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.