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A Transmission Medium and Method for Facilitating Propagation of Electromagnetic Waves via a Core

US 9,997,819 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Jun 12, 2026 on the fee record · High confidence

Second maintenance fee unpaid; grace period ended.

Filed Jun 9, 2015 as application 14/734,073 · Granted Jun 12, 2018
Base term, 20 years from filing
Today
Lapsed Jun 12, 2026
2015 2035
Clock starts
Jun 9, 2015
No longer in force
Jun 12, 2026
Granted
Jun 12, 2018
Term would have run to
Jun 9, 2035
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.
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.
41
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 9, 2035: its 20-year base term, with no 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 Jun 9, 2015, when this application, 14/734,073, was filedJun 9, 2035High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events1 of 3 maintenance fees paidlapsed Jun 12, 2026High confidence
Computed term endThe steps above, in orderJun 12, 2026High confidence

This family

US 9,680,670Lapsed on the fee record
Jun 2025
Jun 2025
US 9,544,006Lapsed on the fee record
Jan 2025
Jan 2025
US 10,009,067Lapsed on the fee record
Jun 2026
Jun 2026
US 9,742,462Lapsed on the fee record
Aug 2025
Aug 2025
US 9,997,819this patent
Jun 2026
Jun 2026
Application PCT/US2015/056632PCT application
no patent term
no patent term
Application PCT/US2015/056626PCT application
no patent term
no patent term
US 9,531,427Lapsed on the fee record
Dec 2024
Dec 2024
8 of 41 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
Jun 11, 2015
Reel 35887, frame 600
Bennett, Robert; Henry, Paul Shala; Barzegar, Farhad; Gerszberg, Irwin; Barnickel, Donald J; Willis, Thomas M., IIIAT&T Intellectual Property I, LPAssignment 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.

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