Term ends Apr 19, 2027 · High confidence
20-year base term ended Sep 8, 2026
Held by Clarcor Inc.
Filed Sep 8, 2006 as application 11/518,555 · Granted Oct 28, 2008
Base term plus 223 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Sep 8, 2006
Sep 8, 2006
Term ends
Apr 19, 2027
Apr 19, 2027
Granted
Oct 28, 2008
Oct 28, 2008
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
223
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 223 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 Sep 8, 2006, when this application, 11/518,555, was filed | Sep 8, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +223 days, USPTO patent term adjustment record | Apr 19, 2027 | 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 | Apr 19, 2027 | 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 |
|---|---|---|---|
| Dec 7, 2006 Reel 18639, frame 731 | Ferreira, David; Williams, Michael J. | Stanadyne Corporation | Assignment of Assignor's Interest |
| Dec 8, 2006 Reel 18649, frame 379 | Janik, Leon P. | Stanadyne Corporation | Assignment of Assignor's Interest |
| Aug 21, 2009 Reel 23129, frame 296 | Stanadyne Corporation | Wells Fargo Foothill, LLC, as Agent | Security Agreement |
| Feb 14, 2013 Reel 29816, frame 346 | Stanadyne Corporation | Jefferies Finance LLC | Patent Security Agreement |
| May 2, 2014 Reel 32813, frame 619 | Wells Fargo Capital Finance, LLC | Stanadyne Corporation | Release of Security Interest |
| May 2, 2014 Reel 32815, frame 204 | Jefferies Finance LLC | Stanadyne Corporation | Release of Security Interest |
| May 21, 2014 Reel 32939, frame 504 | Stanadyne Corporation | Clarcor Engine Mobile Solutions, LLC | Assignment of Assignor's Interest |
| May 21, 2021 Reel 56309, frame 498 | Clarcor Engine Mobile Solutions, LLC | Clarcor Em Holdings, Inc. | Merger |
| May 24, 2021 Reel 56325, frame 637 | Clarcor Em Holdings, Inc. | Clarcor Inc. | Merger |
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
Apr 2027
Term ends Apr 19, 2027. No further fees fall due before then
Note
The 223 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2008 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.