Collateral for a security interest recorded Feb 13, 2024 (KKR Loan Administration Services LLC).
Term ends Dec 31, 2033 · High confidence
20-year base term ends Feb 5, 2033
Filed Dec 28, 2015 as application 14/980,663 · Granted Apr 30, 2019
Base term plus 329 days of patent term adjustment (USPTO delay)
Today
2013
2033
Clock starts
Feb 5, 2013
Feb 5, 2013
Term ends
Dec 31, 2033
Dec 31, 2033
Granted
Apr 30, 2019
Apr 30, 2019
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
329
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 9,221,308, to Dec 31, 2033. The term already ends on or before that date, so the cap shortened nothing.
1 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 329 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 1 of 3 maintenance fees is 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 application 13/759,758, the earliest non-provisional in its chain, was filed (this one was filed Dec 28, 2015) | Feb 5, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +329 days, USPTO patent term adjustment record | Dec 31, 2033 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,221,308) | resolves to Dec 31, 2033, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Dec 31, 2033 | High confidence |
This family
| US 9,221,308 | In force Jan 2034 | Jan 2034 |
| Application PCT/US2013/024898 | PCT application no patent term | no patent term |
| US 10,272,728 | this patent 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 |
|---|---|---|---|
| Mar 27, 2017 Reel 41754, frame 676 | Nelson, Chris; Leclaire, James | Pursuit LLP | Assignment of Assignor's Interest |
| Mar 27, 2017 Reel 41754, frame 820 | Gold, Mark | Stemco LP | Assignment of Assignor's Interest |
| Jan 29, 2018 Reel 44756, frame 290 | Stemco LP | Stemco Products, Inc. | Merger |
| Jun 29, 2018 Reel 46487, frame 749 | Stemco Products, Inc. | Bank of America, N.A., as Administrative Agent | Notice of Grant of Security Interest in Patents |
| Mar 30, 2020 Reel 52259, frame 639 | Bank of America, N.A., as Administrative Agent | Stemco Products, Inc. | 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 52413, frame 75 | Bank of America, N.A., as Administrative Agent | Stemco Products, Inc. | Corrective Release to Correct from Application No. 10272728 to Patent No. 10272728 Previously Recorded on Reel/Frame 052259/0639. Assignor Hereby Confirms the Termination and Release of Security Interest in Patents |
| 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
Dec 2033
Term ends Dec 31, 2033.
Note
The 329 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,221,308, ends no earlier than this term, so it caps nothing.
Citations
2
later US patents cite this one
That is below the median of utility patents granted in 2019 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.