Also listed on Spiracur Inc., an earlier holder on the record. The recorded assignments below show how it moved.

Term ends Feb 2, 2031 · High confidence

Computed 20-year base term

Held by Solventum Intellectual Properties Company

Filed Oct 10, 2008 as application 12/249,759 · Granted Aug 21, 2012

Base term plus 845 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Term ends Feb 2, 2031

2008 2031

Clock starts
Oct 10, 2008

Term ends
Feb 2, 2031

Granted
Aug 21, 2012

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

845

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.

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 845 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 Oct 10, 2008, when this application, 12/249,759, was filed	Oct 10, 2028	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+845 days, USPTO patent term adjustment record	Feb 2, 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	Feb 2, 2031	High confidence

This family

US 8,246,590	this patent 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	In force 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
Mar 23, 2009 Reel 22436, frame 459	Hu, Dean; Pinto, Moshe; Fong, Kenton; Mavani, Akshay; Wu, Kenneth	Spiracur, Inc.	Assignment of Assignor's Interest
Oct 30, 2014 Reel 34076, frame 87	Spiracur Inc., as Grantor	General Electric Capital Corporation, as Agent	Security Interest
Nov 14, 2015 Reel 37111, frame 836	General Electric Capital Corporation, as Retiring Agent	Healthcare Financial Solutions, LLC, as Successor Agent	Assignment of Intellectual Property Security Agreement
Dec 1, 2015 Reel 37179, frame 541	Healthcare Financial Solutions, LLC	Spiracur Inc.	Release of Security Interest
Dec 21, 2015 Reel 37355, frame 210	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 66430, frame 333	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

Feb 2031

Term ends Feb 2, 2031. No further fees fall due before then

Note

The 845 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Citations

215

later US patents cite this one

That is top 5% of utility patents granted in 2012 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.

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