Collateral for a security interest recorded May 24, 2024 (Oha Agency LLC).
Term ends Feb 1, 2028 · Medium confidence
20-year base term ends Feb 1, 2028
Why Medium: A parent in the chain could not be resolved.
Held by Cleaning Systems, LLC
Filed Mar 7, 2008 as application 12/044,684 · Granted Sep 1, 2009
Base term, 20 years from filing
Today
2008
2028
Clock starts
Feb 1, 2008
Feb 1, 2008
Term ends
Feb 1, 2028
Feb 1, 2028
Granted
Sep 1, 2009
Sep 1, 2009
base term
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
None
Term adjustment
No prosecution delay on this record.
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.
2
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 is its 20-year base term, with no adjustment for prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 1, 2008, when application 12/024,133, the earliest non-provisional in its chain, was filed (this one was filed Mar 7, 2008); a parent in its chain could not be resolved (the next row) | Feb 1, 2028 | 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 | None on file | no change | 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 1, 2028 | Medium confidence |
This family
| US 7,582,164 | this patent Feb 2028 | Feb 2028 |
1 of 2 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 |
|---|---|---|---|
| Apr 3, 2008 Reel 20747, frame 790 | Krause, David R.; Burton, Forrest R. | Cleaning Systems, Inc. | Assignment of Assignor's Interest |
| Oct 2, 2020 Reel 53963, frame 78 | Cleaning Systems, LLC; Transclean, LLC | Antares Capital LP, as Administrative Agent | Security Interest |
| Nov 5, 2020 Reel 54332, frame 857 | Cleaning Systems, Inc. | Cleaning Systems, LLC | Certificate of Conversion |
| Dec 29, 2020 Reel 54767, frame 843 | Cleaning Systems, LLC | Ares Capital Corporation, As Administrative Agent | Security Interest |
| Jan 8, 2021 reel/frame not recorded | Antares Capital LP, as Administrative Agent | Transclean, LLC | Patent Release and Reassignment of R/F 053963/0078 |
| Jan 8, 2021 reel/frame not recorded | Antares Capital LP, as Administrative Agent | Cleaning Systems, LLC | Patent Release and Reassignment of R/F 053963/0078 |
| Jan 8, 2021 Reel 54927, frame 921 | Antares Capital LP, as Administrative Agent | Transclean, LLC; Cleaning Systems, LLC | Patent Release and Reassignment of R/F 053963/0078 |
| May 24, 2024 Reel 67519, frame 797 | Cleaning Systems, LLC | Oha Agency LLC, as Administrative Agent | Security Interest |
| May 24, 2024 Reel 67528, frame 490 | Ares Capital Corporation, As Agent | Cleaning Systems, LLC | Release of Security Interest in Intellectual Property at R/F 054767/0843 |
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 2028
Term ends Feb 1, 2028. No further fees fall due before then
Citations
11
later US patents cite this one
That is above the median of utility patents granted in 2009 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.