Collateral for a security interest recorded Dec 2, 2024 (Twin Brook Capital Partners, LLC).
Term ended Jul 5, 2022 · Medium confidence
20-year base term ended Sep 11, 2021
Why Medium: A parent in the chain could not be resolved.
Held by Zonar Systems, Inc.
Filed Oct 11, 2005 as application 11/247,953 · Granted Apr 22, 2008
Base term plus 297 days of patent term adjustment (USPTO delay)
Today
Term ended Jul 5, 2022
2001
2026
Clock starts
Sep 11, 2001
Sep 11, 2001
Term ended
Jul 5, 2022
Jul 5, 2022
Granted
Apr 22, 2008
Apr 22, 2008
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
297
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
71
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 297 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. Confidence: Medium. 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 11, 2001, when application 09/951,104, the earliest non-provisional in its chain, was filed (this one was filed Oct 11, 2005); a parent in its chain could not be resolved (the next row) | Sep 11, 2021 | 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 | +297 days, USPTO patent term adjustment record | Jul 5, 2022 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Jul 5, 2022 | Medium confidence |
This family
| US 6,671,646 | Term ended Feb 2022 | Feb 2022 |
| US 6,804,626 | Term ended Feb 2022 | Feb 2022 |
| US 7,117,121 | Term ended Nov 2021 | Nov 2021 |
| US 7,557,696 | Term ended Feb 2022 | Feb 2022 |
| Application 11/133,139 | Abandoned not computed | not computed |
| US 7,362,229 | this patent Jul 2022 | Jul 2022 |
| US 7,564,375 | Term ended Nov 2022 | Nov 2022 |
| US 7,680,595 | Term ended Aug 2022 | Aug 2022 |
8 of 71 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 |
|---|---|---|---|
| Dec 15, 2005 Reel 16919, frame 994 | Brinton, Brett; McQuade, Charles Michael | Zonar Compliance Systems, LLC | Assignment of Assignor's Interest |
| May 15, 2008 Reel 20941, frame 903 | Zonar Compliance Systems, LLC | Zonar Systems, Inc. | Merger |
| Nov 17, 2014 Reel 34274, frame 129 | Zonar Systems, Inc. | Bank Of America, N.a. | Patent Security Agreement |
| 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
The 297 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
97
later US patents cite this one
That is top 10% of utility patents granted in 2008 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.