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Excitation and Use of Guided Surface Wave Modes on Lossy Media

US 10,680,306 In force
OverviewFamilyAssignmentsSources & methods

Term ends Mar 7, 2033 · High confidence

Filed Feb 12, 2018 as application 15/894,176 · Granted Jun 9, 2020
Base term, 20 years from filing
Today
20 years from filing
2013 2033
Clock starts
Mar 7, 2013
Term ends
Mar 7, 2033
Granted
Jun 9, 2020
base term 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 9,912,031, to Mar 7, 2033. The term already ends on or before that date, so the cap shortened nothing.
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.
6
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 is 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. 1 of 3 maintenance fees is paid so far. 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 Mar 7, 2013, when application 13/789,538, the earliest non-provisional in its chain, was filed (this one was filed Feb 12, 2018)Mar 7, 2033High 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 9,912,031)resolves to Mar 7, 2033, no earlier than this term, so no changeHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events1 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderMar 7, 2033High confidence

This family

US 9,910,144In force
May 2035
May 2035
US 9,912,031In force
Feb 2035
Feb 2035
Application PCT/US2014/019477PCT application
no patent term
no patent term
Application 15/894,145Abandoned
not computed
not computed
US 10,680,306this patent
Mar 2033
Mar 2033
US 11,258,152In force
Apr 2033
Apr 2033
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 4, 2018
Reel 45435, frame 31
Corum, James F.; Corum, Kenneth L.CPG Technologies, LLCAssignment 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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