Term ends Aug 9, 2033 · High confidence
20-year base term ends Jun 1, 2031
Held by Therma-Stor LLC
Filed Jun 1, 2011 as application 13/150,750 · Granted Feb 3, 2015
Base term plus 800 days of patent term adjustment (USPTO delay)
Today
2011
2033
Clock starts
Jun 1, 2011
Jun 1, 2011
Term ends
Aug 9, 2033
Aug 9, 2033
Granted
Feb 3, 2015
Feb 3, 2015
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
800
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.
2
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 800 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 1, 2011, when this application, 13/150,750, was filed | Jun 1, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +800 days, USPTO patent term adjustment record | Aug 9, 2033 | 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 | Aug 9, 2033 | High confidence |
This family
| US 8,943,848 | this patent Aug 2033 | Aug 2033 |
| US 9,816,724 | In force no later than Oct 2031 | no later than Oct 2031 |
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 |
|---|---|---|---|
| Feb 18, 2014 Reel 32236, frame 798 | Thomas & Betts International, Inc. | Reznor Manufacturing Company, LLC | Assignment of Assignor's Interest |
| Apr 29, 2014 Reel 32784, frame 990 | Reznor Manufacturing Company, LLC | Reznor LLC | Change of Name |
| Mar 21, 2022 Reel 59320, frame 314 | Reznor LLC | Nortek Global Hvac LLC | Change of Name |
| Mar 22, 2022 Reel 59342, frame 428 | Nortek Global Hvac LLC | Therma-Stor LLC | 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
Aug 2033
Term ends Aug 9, 2033. No further fees fall due before then
Note
The 800 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
143
later US patents cite this one
That is top 5% of utility patents granted in 2015 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.