Lapsed Sep 17, 2025 on the fee record · High confidence
20-year base term ends May 31, 2031
Third maintenance fee unpaid; grace period ended.
Held by Eaton Intelligent Power Limited
Filed May 31, 2011 as application 13/149,779 · Granted Sep 17, 2013
Base term, 20 years from filing, plus 281 days of patent term adjustment (USPTO delay)
Today
Lapsed Sep 17, 2025
2011
2032
Clock starts
May 31, 2011
May 31, 2011
No longer in force
Sep 17, 2025
Sep 17, 2025
Granted
Sep 17, 2013
Sep 17, 2013
Term would have run to
Mar 7, 2032
Mar 7, 2032
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
281
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
7
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 Mar 7, 2032: its 20-year base term plus 281 days of term adjustment for prosecution delay. 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 May 31, 2011, when this application, 13/149,779, was filed | May 31, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +281 days, USPTO patent term adjustment record | Mar 7, 2032 | 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 | 2 of 3 maintenance fees paid | lapsed Sep 17, 2025 | High confidence |
| Computed term end | The steps above, in order | Sep 17, 2025 | High confidence |
This family
| US 8,534,625 | this patent Sep 2025 | Sep 2025 |
| Application 13/187,349 | Abandoned not computed | not computed |
| Application PCT/US2012/047691 | PCT application no patent term | no patent term |
| US 9,309,088 | In force Jul 2033 | Jul 2033 |
| US 9,239,067 | In force May 2031 | May 2031 |
| Application PCT/US2014/011533 | PCT application no patent term | no patent term |
| US 9,611,874 | Lapsed on the fee record Apr 2025 | Apr 2025 |
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 |
|---|---|---|---|
| Sep 14, 2011 Reel 26909, frame 483 | Heath, Richard W.; Dworak, JR., Dallas M. | Nibco, Inc. | Assignment of Assignor's Interest |
| Aug 12, 2013 Reel 30987, frame 90 | Nibco Inc. | Cooper B-Line, Inc. | Assignment of Assignor's Interest |
| Nov 7, 2018 Reel 47441, frame 577 | Cooper B-Line, Inc. | Eaton Intelligent Power Limited | Assignment of Assignor's 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 281 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
43
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.