Also listed on Impco Technologies (Canada) LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Feb 13, 2029 · High confidence
20-year base term ends Nov 15, 2026
Held by Carrier Corporation
Filed Apr 25, 2008 as application 12/149,095 · Granted Oct 4, 2011
Base term plus 821 days of patent term adjustment (USPTO delay)
Today
2006
2029
Clock starts
Nov 15, 2006
Nov 15, 2006
Term ends
Feb 13, 2029
Feb 13, 2029
Granted
Oct 4, 2011
Oct 4, 2011
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
821
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.
4
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 821 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 Nov 15, 2006, when application 11/560,160, the earliest non-provisional in its chain, was filed (this one was filed Apr 25, 2008) | Nov 15, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +821 days, USPTO patent term adjustment record | Feb 13, 2029 | 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 | Feb 13, 2029 | High confidence |
This family
| US 7,797,958 | In force Nov 2028 | Nov 2028 |
| US 8,030,880 | this patent Feb 2029 | Feb 2029 |
| US 8,381,540 | In force Nov 2028 | Nov 2028 |
| US 8,863,540 | In force Nov 2028 | Nov 2028 |
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 |
|---|---|---|---|
| May 24, 2010 Reel 24424, frame 800 | Glacier Bay, Inc. | Triplepoint Capital LLC | Security Agreement |
| Apr 9, 2012 Reel 28018, frame 425 | Glacier Bay, Inc. | Silicon Valley Bank | Security Agreement |
| Apr 11, 2012 Reel 28028, frame 416 | Alston, Gerald Kevin | Glacier Bay, Inc. | Assignment of Assignor's Interest |
| Apr 11, 2012 Reel 28028, frame 242 | Dobbs, Justin | Glacier Bay, Inc. | Assignment of Assignor's Interest |
| Apr 12, 2012 Reel 28039, frame 549 | Knight, Lawrence M. | Glacier Bay, Inc. | Employee Agreement (SSN Redacted) |
| 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
Feb 2029
Term ends Feb 13, 2029. No further fees fall due before then
Note
The 821 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
110
later US patents cite this one
That is top 10% of utility patents granted in 2011 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.