The Patent Finder
US

Multi-Level Minimally Invasive Spinal Stabilization System

US 8,535,352 In force
OverviewFamilyAssignmentsSources & methods

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

Collateral for a security interest recorded Mar 11, 2026 (Varagon Capital Partners Agent, LLC).

Term ends Mar 16, 2028 · Medium confidence

Why Medium: A parent in the chain could not be resolved.

Filed Mar 28, 2008 as application 12/079,676 · Granted Sep 17, 2013
Base term plus 1243 days of patent term adjustment (USPTO delay)
Today
20 years from filing
2004 2028
Clock starts
Oct 20, 2004
Term ends
Mar 16, 2028
Granted
Sep 17, 2013
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
1,243
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.
29
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 1243 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Oct 20, 2004, when application 10/970,366, the earliest non-provisional in its chain, was filed (this one was filed Mar 28, 2008); a parent in its chain could not be resolved (the next row)Oct 20, 2024High confidence
Continuity chainA parent in the chain could not be resolveddated from this application's own claimMedium confidence
Patent term adjustment+1243 days, USPTO patent term adjustment recordMar 16, 2028High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events3 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderMar 16, 2028Medium confidence

This family

US 8,162,985Lapsed on the fee record
Apr 2024
Apr 2024
US 8,075,595Lapsed on the fee record
Dec 2019
Dec 2019
US 7,998,175In force
Jun 2028
Jun 2028
Application PCT/US2005/038021PCT application
no patent term
no patent term
US 8,226,690Lapsed on the fee record
Jul 2016
Jul 2016
US 8,025,680Lapsed on the fee record
Sep 2015
Sep 2015
US 7,935,134Lapsed on the fee record
May 2015
May 2015
Application PCT/US2006/028586PCT application
no patent term
no patent term
8 of 29 applications in this family shown, earliest filings first. 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
Apr 30, 2008
Reel 20879, frame 732
Altarac, Moti; Reglos, Joey Camia; Hayes, Stanley KyleVertiflex, Inc.Assignment of Assignor's Interest
Oct 1, 2010
Reel 25081, frame 908
Vertiflex, Inc.Exactech, Inc.Assignment of Assignor's Interest
Dec 22, 2015
Reel 37358, frame 571
Exactech, Inc.; Altiva, LLC; Brighton Partners, LLC; Exactech U.S., Inc.; Exactech International, LLCJPMorgan Chase Bank, N.A., as Administrative AgentSecurity Interest
Mar 1, 2017
Reel 41425, frame 932
Exactech, Inc.Choice Spine, LPAssignment of Assignor's Interest
Feb 15, 2018
Reel 45345, frame 933
JPMorgan Chase Bank, N.A., as Administrative AgentExactech, Inc.; Exactech U.S., Inc.; Altiva, LLC; Brighton Partners, LLC; Exactech International, LLCSecurity Release Reel/Frame 037358/0571
Feb 15, 2018
reel/frame not recorded
JPMorgan Chase Bank, N.A., as Administrative AgentExactech, Inc.Security Release Reel/Frame 037358/0571
Feb 15, 2018
reel/frame not recorded
JPMorgan Chase Bank, N.A., as Administrative AgentExactech U.S., Inc.Security Release Reel/Frame 037358/0571
Feb 15, 2018
reel/frame not recorded
JPMorgan Chase Bank, N.A., as Administrative AgentAltiva, LLCSecurity Release Reel/Frame 037358/0571
Feb 15, 2018
reel/frame not recorded
JPMorgan Chase Bank, N.A., as Administrative AgentBrighton Partners, LLCSecurity Release Reel/Frame 037358/0571
Feb 15, 2018
reel/frame not recorded
JPMorgan Chase Bank, N.A., as Administrative AgentExactech International, LLCSecurity Release Reel/Frame 037358/0571
Nov 21, 2018
Reel 48147, frame 243
Choice Spine, LPChoice Spine, LLCConversion of Entity
Nov 29, 2018
Reel 47618, frame 524
Choice Spine, LLCAbacus Finance Group, LLCSecurity Interest
Feb 11, 2026
Reel 73760, frame 458
Abacus Finance Group, LLCChoice Spine, LLCRelease of Security Interest
Mar 11, 2026
Reel 74049, frame 289
Choice Spine, LLCVaragon Capital Partners Agent, LLC, as Administrative AgentSecurity 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