The Patent Finder
US

Instruments and Methods for Inserting Artificial Intervertebral Implants

US 9,539,114 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Jan 10, 2025 on the fee record · High confidence

Second maintenance fee unpaid; grace period ended.

Filed Oct 10, 2013 as application 14/051,086 · Granted Jan 10, 2017
Base term, 20 years from filing, plus 381 days of patent term adjustment (USPTO delay)
Today
Lapsed Jan 10, 2025
2009 2030
Clock starts
Jan 16, 2009
No longer in force
Jan 10, 2025
Granted
Jan 10, 2017
Term would have run to
Feb 1, 2030
base term patent term adjustment 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
381
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.

Its term would have run to Feb 1, 2030: its 20-year base term plus 381 days of term adjustment for prosecution delay. 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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Jan 16, 2009, when application 12/321,373, the earliest non-provisional in its chain, was filed (this one was filed Oct 10, 2013)Jan 16, 2029High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+381 days, USPTO patent term adjustment recordFeb 1, 2030High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events1 of 3 maintenance fees paidlapsed Jan 10, 2025High confidence
Computed term endThe steps above, in orderJan 10, 2025High confidence

This family

US 8,579,911Lapsed on the fee record
Nov 2017
Nov 2017
US 9,539,114this patent
Jan 2025
Jan 2025
US 10,245,154In force
Jun 2029
Jun 2029
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
Oct 24, 2013
Reel 31558, frame 635
Dudasik, Michael W.Spinecore, Inc.Assignment of Assignor's Interest
Sep 25, 2020
Reel 53897, frame 621
Spinecore, Inc.Howmedica Oteonics Corp.Merger
Sep 30, 2020
Reel 53941, frame 753
Spinecore, Inc.Howmedica Osteonics Corp.Corrective Assignment to Correct the Assignee Name Previously Recorded at Reel: 053897 Frame: 0621. Assignor(S) Hereby Confirms the Assignment.

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