Also listed on Impco Technologies (Canada) LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 10, 2030 · High confidence
20-year base term ends Dec 3, 2029
Held by Carrier Corporation
Filed Dec 3, 2009 as application 12/591,902 · Granted Jan 1, 2013
Base term plus 342 days of patent term adjustment (USPTO delay)
Today
2009
2030
Clock starts
Dec 3, 2009
Dec 3, 2009
Term ends
Nov 10, 2030
Nov 10, 2030
Granted
Jan 1, 2013
Jan 1, 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
342
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.
This patent's term runs 342 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 Dec 3, 2009, when this application, 12/591,902, was filed | Dec 3, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +342 days, USPTO patent term adjustment record | Nov 10, 2030 | 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 | Nov 10, 2030 | High confidence |
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 |
|---|---|---|---|
| May 24, 2010 Reel 24424, frame 800 | Glacier Bay, Inc. | Triplepoint Capital LLC | Security Agreement |
| Apr 11, 2012 Reel 28027, frame 556 | Alston, Gerald Allen | Glacier Bay, Inc. | Assignment of Assignor's Interest |
| May 3, 2012 Reel 28160, frame 776 | Triple Point Capital LLC, a Delaware Limited Liability Company; Silicon Valley Bank, a California Chartered Bank | Crosspoint Solutions, LLC | Transfer Statement |
| May 9, 2013 Reel 30384, frame 408 | Crosspoint Solutions, LLC | Wells Fargo Bank, National Association | Security Agreement |
| Apr 18, 2016 Reel 38309, frame 804 | Crosspoint Solutions, LLC | Impco Technologies (Canada) LLC | Assignment of Assignor's Interest |
| Dec 22, 2016 Reel 40756, frame 491 | Wells Fargo Bank, National Association | Impco Technologies (Canada) LLC | Release of Security Interest |
| Feb 17, 2017 Reel 41290, frame 795 | Impco Technologies (Canada) LLC | Westport Power Inc. | Nunc Pro Tunc Assignment |
| May 18, 2017 Reel 42428, frame 443 | Westport Power Inc. | Carrier Corporation | 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
Nov 2030
Term ends Nov 10, 2030. No further fees fall due before then
Note
The 342 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
7
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.