Term ends Sep 1, 2031 · High confidence
20-year base term ends Jun 2, 2030
Filed Jun 2, 2010 as application 12/792,721 · Granted Oct 29, 2013
Base term plus 456 days of patent term adjustment (USPTO delay)
Today
2010
2031
Clock starts
Jun 2, 2010
Jun 2, 2010
Term ends
Sep 1, 2031
Sep 1, 2031
Granted
Oct 29, 2013
Oct 29, 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
456
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.
11
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 456 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 Jun 2, 2010, when this application, 12/792,721, was filed | Jun 2, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +456 days, USPTO patent term adjustment record | Sep 1, 2031 | 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 | Sep 1, 2031 | High confidence |
This family
| US 7,387,763 | Lapsed on the fee record Jun 2020 | Jun 2020 |
| US 8,021,604 | Lapsed on the fee record Sep 2019 | Sep 2019 |
| US D618,760 | Term ended Jun 2024 | Jun 2024 |
| US 8,568,593 | this patent Sep 2031 | Sep 2031 |
| US D672,009 | In force Dec 2026 | Dec 2026 |
| US 8,206,645 | Lapsed on the fee record Jun 2020 | Jun 2020 |
| US D718,412 | In force Nov 2028 | Nov 2028 |
| US D762,279 | In force Jul 2030 | Jul 2030 |
8 of 11 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 |
|---|---|---|---|
| Aug 17, 2010 Reel 24845, frame 753 | Flournoy, Wayne J.; Pehrson, Richard L. | Entex Technologies, Inc. | Assignment of Assignor's Interest |
| Sep 18, 2017 Reel 43611, frame 405 | Entex Technologies Inc. | Nexom Inc., a Manitoba Corporation C/O Nexom (US), Inc. | Assignment of Assignor's Interest |
| Jul 29, 2021 Reel 57650, frame 169 | Environmental Dynamics International, Inc.; Environmental Operating Solutions, Inc.; Nexom Inc.; Nexom (US), Inc. | Wells Fargo Bank, National Association | Security Interest |
| Jun 3, 2026 reel/frame not recorded | Wells Fargo Bank | Environmental Dynamics International, Inc. | Termination and Release of Patent Security Agreement Reel-Frame 57650/0169 |
| Jun 3, 2026 reel/frame not recorded | Wells Fargo Bank | Environmental Operating Solutions, Inc. | Termination and Release of Patent Security Agreement Reel-Frame 57650/0169 |
| Jun 3, 2026 reel/frame not recorded | Wells Fargo Bank | Nexom Inc. | Termination and Release of Patent Security Agreement Reel-Frame 57650/0169 |
| Jun 3, 2026 reel/frame not recorded | Wells Fargo Bank | Nexom (US), Inc. | Termination and Release of Patent Security Agreement Reel-Frame 57650/0169 |
| Jun 3, 2026 Reel 75874, frame 334 | Wells Fargo Bank | Environmental Dynamics International, Inc.; Environmental Operating Solutions, Inc.; Nexom Inc.; Nexom (US), Inc. | Termination and Release of Patent Security Agreement Reel-Frame 57650/0169 |
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.
What's changing
Sep 2031
Term ends Sep 1, 2031. No further fees fall due before then
Note
The 456 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is below the median 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.