The Patent Finder
US

Closed Incision Negative Pressure Wound Therapy Device and Methods of Use

US 8,834,434 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Sep 16, 2026 on the fee record · Low confidence

Third maintenance fee unpaid; grace period ended. The USPTO has not yet posted the lapse.

Filed Oct 18, 2013 as application 14/058,175 · Granted Sep 16, 2014
Base term, 20 years from filing
Today
Lapsed Sep 16, 2026
2008 2028
Clock starts
Oct 10, 2008
No longer in force
Sep 16, 2026
Granted
Sep 16, 2014
Term would have run to
Oct 10, 2028
base term after the term ends 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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,562,576, to Oct 10, 2028. The term already ends on or before that date, so the cap shortened nothing.
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.
7
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

Its term would have run to Oct 10, 2028: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. Confidence: Low. 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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Oct 10, 2008, when application 12/249,759, the earliest non-provisional in its chain, was filed (this one was filed Oct 18, 2013)Oct 10, 2028High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capDisclaimer resolved from the filed document (refs US 8,562,576)resolves to Oct 10, 2028, no earlier than this term, so no changeHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee eventsThe fee record shows no payment for this window, and USPTO's status still reads "Patented Case"lapsed Sep 16, 2026Medium confidence
Further caveats on recordThe record rates this date lower than the steps above account forLow confidence overallLow confidence
Computed term endThe steps above, in orderSep 16, 2026Low confidence

This family

US 8,246,590In force
Feb 2031
Feb 2031
US 8,435,221In force
Nov 2028
Nov 2028
US 8,562,576Lapsed on the fee record
Oct 2025
Oct 2025
US 8,834,434this patent
Sep 2026
Sep 2026
US 9,421,133In force
no later than Oct 2028
no later than Oct 2028
US 10,322,033In force
no later than Sep 2029
no later than Sep 2029
Application 16/402,051Abandoned
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.
RecordedAssignorAssigneeConveyance
Nov 25, 2013
Reel 31667, frame 70
Hu, Dean; Pinto, Moshe; Fong, Kenton; Mavani, Akshay; Wu, KennethSpiracur Inc.Assignment of Assignor's Interest
Oct 30, 2014
Reel 34076, frame 87
Spiracur Inc., as GrantorGeneral Electric Capital Corporation, as AgentSecurity Interest
Nov 14, 2015
Reel 37111, frame 836
General Electric Capital Corporation, as Retiring AgentHealthcare Financial Solutions, LLC, as Successor AgentAssignment of Intellectual Property Security Agreement
Dec 1, 2015
Reel 37179, frame 541
Healthcare Financial Solutions, LLCSpiracur 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 AgentSecond Lien Security Agreement
Oct 7, 2016
Reel 40291, frame 237
KCI USA, Inc.; Lifecell Corporation; KCI Licensing, Inc.Wilmington Trust, National Association, as Collateral AgentLimited Third Lien Intellectual Property Security Agreement
Feb 8, 2017
Reel 41666, frame 320
Wilmington TrustKCI USA, Inc.Release of Security Interest Reel/Frame 040098/0268
Nov 7, 2019
Reel 50966, frame 547
Wilmington Trust, National AssociationKCI USA, Inc.; KCI Licensing, Inc.Release of Security Interest in Patents
Nov 7, 2019
reel/frame not recorded
Wilmington Trust, National AssociationKCI USA, Inc.Release of Security Interest in Patents
Nov 7, 2019
reel/frame not recorded
Wilmington Trust, National AssociationKCI Licensing, Inc.Release of Security Interest in Patents
Aug 28, 2023
Reel 64730, frame 636
KCI Licensing, Inc.3M Innovative Properties CompanyAssignment of Assignor's Interest
Feb 1, 2024
Reel 66436, frame 63
3M Innovative Properties CompanySolventum Intellectual Properties CompanyAssignment 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.

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited