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Helicopter Rotor Control System with Individual Blade Control

US 8,201,771 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Jun 19, 2024 on the fee record · Medium confidence

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

Third maintenance fee unpaid; grace period ended.

Filed Jan 7, 2011 as application 12/986,664 · Granted Jun 19, 2012
Base term, 20 years from filing, plus 26 days of patent term adjustment (USPTO delay)
Today
Lapsed Jun 19, 2024
2005 2026
Clock starts
May 6, 2005
No longer in force
Jun 19, 2024
Granted
Jun 19, 2012
Term would have run to
Jun 1, 2025
base term patent term adjustment after the term ends fee events Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
26
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
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 Jun 1, 2025: its 20-year base term plus 26 days of term adjustment for prosecution delay. 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 May 6, 2005, when application PCT/IB2005/004194, the earliest non-provisional in its chain, was filed (this one was filed Jan 7, 2011); a parent in its chain could not be resolved (the next row)May 6, 2025High confidence
Continuity chainA parent in the chain could not be resolveddated from this application's own claimMedium confidence
Patent term adjustment+26 days, USPTO patent term adjustment recordJun 1, 2025High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 3 maintenance fees paidlapsed Jun 19, 2024High confidence
Computed term endThe steps above, in orderJun 19, 2024Medium confidence

This family

US 7,900,869In force
May 2028
May 2028
US 8,201,771this patent
Jun 2024
Jun 2024
2 of 3 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
Jan 21, 2010
Reel 23824, frame 64
Agnew, Thomas J.; Agnew, Frank D.Accenture Global Services GmbHAssignment of Assignor's Interest
Mar 29, 2023
Reel 63138, frame 498
ZF Friedrichshafen AGZF Luftfahrttechnik GmbHAssignment of Assignor's Interest
Mar 29, 2023
Reel 63186, frame 644
ZF Luftfahrttechnik GmbHAirbus Helicopters Technik GmbHChange of Name

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.

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