Term ends Mar 28, 2027 · High confidence
20-year base term ends Mar 28, 2027
Held by Esco Group LLC
Filed Jan 13, 2011 as application 13/005,791 · Granted Feb 28, 2012
Base term, 20 years from filing
Today
2007
2027
Clock starts
Mar 28, 2007
Mar 28, 2007
Term ends
Mar 28, 2027
Mar 28, 2027
Granted
Feb 28, 2012
Feb 28, 2012
base term
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
None
Term adjustment
No prosecution delay on this record.
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.
13
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 is its 20-year base term, with no adjustment for 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 Mar 28, 2007, when application 11/729,502, the earliest non-provisional in its chain, was filed (this one was filed Jan 13, 2011) | Mar 28, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | Mar 28, 2027 | High confidence |
This family
| US 7,882,649 | In force Sep 2028 | Sep 2028 |
| US 8,122,621 | this patent Mar 2027 | Mar 2027 |
| Application 13/369,699 | Abandoned not computed | not computed |
| US 8,689,472 | Lapsed on the fee record Apr 2026 | Apr 2026 |
| Application 13/705,562 | Abandoned not computed | not computed |
| US 8,839,535 | Lapsed on the fee record Sep 2026 | Sep 2026 |
| US 9,493,930 | In force Mar 2027 | Mar 2027 |
| US 9,816,254 | Lapsed on the fee record Nov 2025 | Nov 2025 |
8 of 13 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 |
|---|---|---|---|
| Jan 13, 2011 Reel 25632, frame 700 | Carpenter, Christopher M; Conklin, Donald M; Morris, Ray J; Bearden, James E; Durand, Severn D | Esco Corporation | Assignment of Assignor's Interest |
| Jul 3, 2012 Reel 28496, frame 848 | Esco Corporation | Bank of America, N.A., as Administrative Agent | Notice of Grant of Security Interest in Patents |
| Jan 31, 2013 Reel 29730, frame 860 | Carpenter, Christopher M; Conklin, Donald M; Morris, Ray J; Bearden, James E; Durand, Severn D | Esco Corporation | Assignment of Assignor's Interest |
| May 9, 2013 Reel 30388, frame 273 | Radzius, Dziugas | Esco Corporation | Assignment of Assignor's Interest |
| Jul 16, 2018 Reel 46355, frame 676 | Bank Of America, N.a. | Esco Corporation | Release of Security Interest |
| Aug 17, 2018 Reel 46848, frame 493 | Esco Corporation; Esco Group LLC | Esco Group LLC | Merger and Change of Name |
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
Mar 2027
Term ends Mar 28, 2027. No further fees fall due before then
Citations
57
later US patents cite this one
That is top 25% of utility patents granted in 2012 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.