Term ends Jun 11, 2031 · High confidence
20-year base term ends Jun 11, 2030
Held by Parker-Hannifin Corporation
Filed Jun 11, 2010 as application 12/813,603 · Granted Sep 17, 2013
Base term plus 365 days of patent term adjustment (USPTO delay)
Today
2010
2031
Clock starts
Jun 11, 2010
Jun 11, 2010
Term ends
Jun 11, 2031
Jun 11, 2031
Granted
Sep 17, 2013
Sep 17, 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
365
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.
6
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 365 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 Jun 11, 2010, when this application, 12/813,603, was filed | Jun 11, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +365 days, USPTO patent term adjustment record | Jun 11, 2031 | 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 | Jun 11, 2031 | High confidence |
This family
| Application 61/186,621 | Provisional application no patent term | no patent term |
| US 8,535,404 | this patent Jun 2031 | Jun 2031 |
| Application PCT/US2010/038265 | PCT application no patent term | no patent term |
| Application PCT/US2010/038267 | PCT application no patent term | no patent term |
| US 9,504,945 | In force Jun 2030 | Jun 2030 |
| US 8,668,755 | In force Jun 2030 | Jun 2030 |
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 23, 2010 Reel 24869, frame 897 | Crabtree, Lamonte A.; Harriman, Mike; Raider, Mike | Clarcor Air Filtration Products | Assignment of Assignor's Interest |
| Oct 1, 2020 Reel 53946, frame 203 | Clarcor Air Filtration Products, Inc. | Clarcor Inc. | Merger |
| Oct 1, 2020 Reel 53946, frame 593 | Clarcor, Inc. | Parker-Hannifin Corporation | Merger |
| Nov 10, 2020 Reel 54371, frame 141 | Parker-Hannifin Corporation | Parker Intangibles LLC | Assignment of Assignor's Interest |
| Apr 27, 2023 Reel 63461, frame 669 | Parker Intangibles LLC | Parker-Hannifin 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
Jun 2031
Term ends Jun 11, 2031. No further fees fall due before then
Note
The 365 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
50
later US patents cite this one
That is top 25% 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.