Term ends Aug 31, 2033 · High confidence
20-year base term ends Sep 14, 2027
Held by Crown Equipment Corporation
Filed Dec 4, 2009 as application 12/631,007 · Granted May 9, 2017
Base term plus 2178 days of patent term adjustment (USPTO delay)
Today
2007
2033
Clock starts
Sep 14, 2007
Sep 14, 2007
Term ends
Aug 31, 2033
Aug 31, 2033
Granted
May 9, 2017
May 9, 2017
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
2,178
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.
14
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 2178 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Sep 14, 2007, when applications 11/855,310, 11/855,324 and PCT/US2007/078455, the earliest non-provisional applications in its chain, were filed (this one was filed Dec 4, 2009) | Sep 14, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +2178 days, USPTO patent term adjustment record | Aug 31, 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 31, 2033 | High confidence |
This family
| US 9,082,293 | In force Nov 2032 | Nov 2032 |
| US 8,072,309 | In force Sep 2030 | Sep 2030 |
| Application PCT/US2007/078455 | PCT application no patent term | no patent term |
| US 9,645,968 | this patent Aug 2033 | Aug 2033 |
| Application PCT/US2009/066789 | PCT application no patent term | no patent term |
| US 8,452,464 | In force Aug 2029 | Aug 2029 |
| Application PCT/US2009/069833 | PCT application no patent term | no patent term |
| US 8,970,363 | In force Feb 2030 | Feb 2030 |
8 of 14 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 |
|---|---|---|---|
| Jan 15, 2010 Reel 23793, frame 314 | Elston, Edwin R.; Siefring, Vernon W.; Jensen, Eric L. | Crown Equipment 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
Aug 2033
Term ends Aug 31, 2033. Maintenance fees still fall due before then
Note
The 2178 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
88
later US patents cite this one
That is top 5% 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.