Term ends no later than Sep 26, 2029 · Medium confidence
20-year base term ends Oct 10, 2028
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Filed Jul 21, 2016 as application 15/216,500 · Granted Jun 18, 2019
Base term plus 351 days of patent term adjustment (USPTO delay)
Today
2008
2029
Clock starts
Oct 10, 2008
Oct 10, 2008
Ends no later than
Sep 26, 2029
Sep 26, 2029
Granted
Jun 18, 2019
Jun 18, 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
351
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
1 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
7
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 351 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 1 of 2 maintenance fees is paid so far. 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 Oct 10, 2008, when application 12/249,759, the earliest non-provisional in its chain, was filed (this one was filed Jul 21, 2016) | Oct 10, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +351 days, USPTO patent term adjustment record | Sep 26, 2029 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than Sep 26, 2029 | Medium confidence |
This family
| US 8,246,590 | In force Feb 2031 | Feb 2031 |
| US 8,435,221 | In force Nov 2028 | Nov 2028 |
| US 8,562,576 | Lapsed on the fee record Oct 2025 | Oct 2025 |
| US 8,834,434 | Lapsed on the fee record Sep 2026 | Sep 2026 |
| US 9,421,133 | In force no later than Oct 2028 | no later than Oct 2028 |
| US 10,322,033 | this patent no later than Sep 2029 | no later than Sep 2029 |
| Application 16/402,051 | Abandoned not computed | not computed |
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 |
|---|---|---|---|
| Jul 22, 2016 Reel 39220, frame 534 | Hu, Dean; Pinto, Moshe; Fong, Kenton; Mavani, Akshay; Wu, Kenneth | Spiracur, Inc. | Assignment of Assignor's Interest |
| Jul 22, 2016 Reel 39226, frame 16 | Spiracur Inc. | KCI Licensing, Inc. | Assignment of Assignor's Interest |
| Sep 21, 2016 Reel 40098, frame 268 | KCI USA, Inc.; Lifecell Corporation; KCI Licensing, Inc. | Wilmington Trust, National Association, as Collateral Agent | Second Lien Security Agreement |
| Oct 7, 2016 Reel 40291, frame 237 | KCI USA, Inc.; Lifecell Corporation; KCI Licensing, Inc. | Wilmington Trust, National Association, as Collateral Agent | Limited Third Lien Intellectual Property Security Agreement |
| Feb 8, 2017 Reel 41666, frame 320 | Wilmington Trust | KCI USA, Inc. | Release of Security Interest Reel/Frame 040098/0268 |
| Nov 7, 2019 Reel 50966, frame 547 | Wilmington Trust, National Association | KCI USA, Inc.; KCI Licensing, Inc. | Release of Security Interest in Patents |
| Nov 7, 2019 reel/frame not recorded | Wilmington Trust, National Association | KCI USA, Inc. | Release of Security Interest in Patents |
| Nov 7, 2019 reel/frame not recorded | Wilmington Trust, National Association | KCI Licensing, Inc. | Release of Security Interest in Patents |
| Aug 28, 2023 Reel 64730, frame 636 | KCI Licensing, Inc. | 3M Innovative Properties Company | Assignment of Assignor's Interest |
| Feb 1, 2024 Reel 66445, frame 336 | 3M Innovative Properties Company | Solventum Intellectual Properties Company | 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
Sep 2029
Term ends no later than Sep 26, 2029. Maintenance fees still fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 351 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Sep 26, 2029. We will not guess the cap.
Citations
16
later US patents cite this one
That is top 25% 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.