Collateral for a security interest recorded Apr 22, 2026 (Twin Brook Capital Partners, LLC).
Term ends Dec 15, 2029 · High confidence
20-year base term ends Aug 11, 2028
Held by Ecotech, LLC
Filed Jul 1, 2009 as application 12/496,139 · Granted Dec 17, 2013
Base term plus 491 days of patent term adjustment (USPTO delay)
Today
2008
2029
Clock starts
Aug 11, 2008
Aug 11, 2008
Term ends
Dec 15, 2029
Dec 15, 2029
Granted
Dec 17, 2013
Dec 17, 2013
base term
patent term adjustment
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
491
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.
9
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 491 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Aug 11, 2008, when application 12/189,365, the earliest non-provisional in its chain, was filed (this one was filed Jul 1, 2009) | Aug 11, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +491 days, USPTO patent term adjustment record | Dec 15, 2029 | 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 | In force | High confidence |
| Computed term end | The steps above, in order | Dec 15, 2029 | High confidence |
This family
| US 8,214,937 | In force May 2031 | May 2031 |
| US 8,607,374 | this patent Dec 2029 | Dec 2029 |
| US 9,295,612 | In force Dec 2029 | Dec 2029 |
| US 9,283,141 | In force Jan 2029 | Jan 2029 |
| US 9,737,460 | In force Aug 2028 | Aug 2028 |
| US 10,285,903 | In force Aug 2028 | Aug 2028 |
| US 10,716,732 | In force Aug 2028 | Aug 2028 |
| US 11,219,576 | In force Aug 2028 | Aug 2028 |
8 of 9 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 16, 2015 Reel 37045, frame 568 | Ecotech, Inc. | M&T Bank | Security Interest |
| Nov 16, 2015 Reel 37045, frame 676 | Ecotech Marine LLC | M&T Bank | Security Interest |
| Mar 9, 2021 Reel 55529, frame 967 | Ecotech Marine, LLC | Ecotech, LLC | Change of Name |
| Oct 20, 2021 Reel 57861, frame 897 | Lawyer, Justin; Clasen, Patrick; Marks, Timothy | Ecotech Marine, LLC | Assignment of Assignor's Interest |
| Apr 22, 2026 Reel 74444, frame 986 | Ecotech, LLC | Twin Brook Capital Partners, LLC, as Administrative Agent | Security Interest |
| May 22, 2026 Reel 74746, frame 270 | M&T Bank | Ecotech, Inc. | Release of Security Interest |
| May 22, 2026 Reel 74746, frame 280 | M&T Bank | Ecotech LLC, Successor in Title to Ecotech Marine LLC | Release of 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
Dec 2029
Term ends Dec 15, 2029. No further fees fall due before then
Note
The 491 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
30
later US patents cite this one
That is top 25% of utility patents granted in 2013 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.