Term ends Oct 29, 2035 · Medium confidence
20-year base term ends Feb 27, 2029
Why Medium: A parent in the chain could not be resolved.
Held by Thermo King LLC
Filed Jul 10, 2009 as application 12/501,261 · Granted Sep 12, 2017
Base term plus 2435 days of patent term adjustment (USPTO delay)
Today
2009
2035
Clock starts
Feb 27, 2009
Feb 27, 2009
Term ends
Oct 29, 2035
Oct 29, 2035
Granted
Sep 12, 2017
Sep 12, 2017
base term
patent term adjustment
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
2,435
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.
3
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 2435 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. Confidence: Medium. 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 Feb 27, 2009, when application 12/395,277, the earliest non-provisional in its chain, was filed (this one was filed Jul 10, 2009); a parent in its chain could not be resolved (the next row) | Feb 27, 2029 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +2435 days, USPTO patent term adjustment record | Oct 29, 2035 | 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 | In force | High confidence |
| Computed term end | The steps above, in order | Oct 29, 2035 | Medium confidence |
This family
| US 9,758,014 | this patent Oct 2035 | Oct 2035 |
| US 9,272,600 | In force Feb 2029 | Feb 2029 |
2 of 3 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 |
|---|---|---|---|
| Aug 5, 2009 Reel 23053, frame 525 | Melbostad, Steven; Kroeker, Christopher J.; Hong, Lawrence P.; Duffy, Martin | Thermo King Corporation | Assignment of Assignor's Interest |
| Oct 3, 2023 Reel 65113, frame 356 | Thermo King Corporation | Thermo King LLC | 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
Oct 2035
Term ends Oct 29, 2035. Maintenance fees still fall due before then
Note
The 2435 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
38
later US patents cite this one
That is top 10% of utility patents granted in 2017 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.