Collateral for a security interest recorded Feb 13, 2024 (KKR Loan Administration Services LLC).
Term ends Jan 26, 2034 · High confidence
20-year base term ends Feb 5, 2033
Filed Feb 5, 2013 as application 13/759,758 · Granted Dec 29, 2015
Base term plus 355 days of patent term adjustment (USPTO delay)
Today
2013
2034
Clock starts
Feb 5, 2013
Feb 5, 2013
Term ends
Jan 26, 2034
Jan 26, 2034
Granted
Dec 29, 2015
Dec 29, 2015
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
355
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 355 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 Feb 5, 2013, when this application, 13/759,758, was filed | Feb 5, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +355 days, USPTO patent term adjustment record | Jan 26, 2034 | 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 | Jan 26, 2034 | High confidence |
This family
| US 9,221,308 | this patent Jan 2034 | Jan 2034 |
| Application PCT/US2013/024898 | PCT application no patent term | no patent term |
| US 10,272,728 | In force Dec 2033 | Dec 2033 |
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 |
|---|---|---|---|
| May 29, 2013 Reel 30499, frame 932 | Stemco LP; Technetics Group LLC | Bamk of America, N.A., as Agent | Assignment of Assignor's Interest |
| May 30, 2013 Reel 30511, frame 25 | Stemco LP; Technetics Group LLC | Bank of America, N.A., as Agent | Corrective Assignment to Correct the Conveyance Type Changed to Security Agreement and Receiving Party Name Corrected to Bank of America, N.A., as Agent Previously Recorded on Reel 030499 Frame 0932. Assignor(S) Hereby Confirms the Document. |
| Aug 22, 2013 Reel 31063, frame 793 | Nelson, Chris; Leclaire, James | Pursuit LLP | Assignment of Assignor's Interest |
| Aug 7, 2014 Reel 33490, frame 361 | Gold, Mark | Stemco LP | Assignment of Assignor's Interest |
| Jan 29, 2018 Reel 44756, frame 290 | Stemco LP | Stemco Products, Inc. | Merger |
| Mar 30, 2020 Reel 52259, frame 612 | Bank of America, N.A., as Agent | Stemco Products, Inc. (Successor-by-Merger to Stemco LP) | Termination and Release of Security Interest in Patents |
| Apr 15, 2020 Reel 52409, frame 16 | Pursuit LLP; Nelson, Christopher; Leclaire, James | Pressure Systems International, Inc. | Assignment of Assignor's Interest |
| Apr 16, 2020 Reel 52421, frame 681 | Stemco Products, Inc. | Pressure Systems International, Inc. | Assignment of Assignor's Interest |
| Apr 23, 2020 Reel 52480, frame 473 | Pressure Systems International, Inc. | Equalaire Systems, Inc. | Assignment of Assignor's Interest |
| Jul 15, 2022 Reel 60667, frame 237 | Equalaire Systems, Inc. | Pressure Systems International, LLC | Assignment of Assignor's Interest |
| Aug 29, 2022 Reel 61356, frame 146 | Pressure Systems International, LLC; Fleetilla, LLC | Midcap Financial Trust, As Administrative Agent | Security Interest |
| Feb 13, 2024 Reel 66566, frame 815 | Pressure Systems International, LLC | KKR Loan Administration Services LLC | Security Interest |
| Feb 13, 2024 Reel 66582, frame 756 | Midcap Financial Trust | Pressure Systems International, LLC; Fleetilla, LLC | Release of Security Interest |
| Feb 13, 2024 reel/frame not recorded | Midcap Financial Trust | Pressure Systems International, LLC | Release of Security Interest |
| Feb 13, 2024 reel/frame not recorded | Midcap Financial Trust | Fleetilla, LLC | Release of Security 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
Jan 2034
Term ends Jan 26, 2034. Maintenance fees still fall due before then
Note
The 355 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 25% of utility patents granted in 2015 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.