Security System for Handheld Wireless Devices Using Time-Variable Encryption Keys

US 11,375,366 Term ended

Overview Sources & methods

Term ended Jun 26, 2026 · High confidence

Computed 20-year base term

USPTO later recorded it as expired for non-payment on Aug 3, 2026.

Held by Encryptpat, LLC

Filed May 8, 2020 as application 16/869,940 · Granted Jun 28, 2022

Base term, 20 years from filing

Today

20 years from filing

Term ended Jun 26, 2026

2006 2026

Clock starts
Jun 26, 2006

Term ended
Jun 26, 2026

Granted
Jun 28, 2022

base term after the term ends 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

None

Term adjustment

No prosecution delay on this record.

No effect

Terminal disclaimer

Resolved from the filed document, referencing US 10,652,734, to Jun 26, 2026. The term already ends on or before that date, so the cap shortened nothing.

None due

Maintenance fees

This term ends before the first maintenance fee's grace period does, 4 years from grant, so no fee can end it early.

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.

Step	Input	Date after this step	Confidence
Base term, 20 years from filing	Clock starts Jun 26, 2006, when the earliest non-provisional application in its chain was filed (this one was filed May 8, 2020)	Jun 26, 2026	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	None on file	no change	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 10,652,734)	resolves to Jun 26, 2026, no earlier than this term, so no change	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	No maintenance fee can end the term early	term ended	High confidence
USPTO status record	Recorded as expired for non-payment on Aug 3, 2026, after the term ended	no change	High confidence
Computed term end	The steps above, in order	Jun 26, 2026	High confidence

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.

Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.

Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

Security System for Handheld Wireless Devices Using Time-Variable Encryption Keys

Term ended Jun 26, 2026 · High confidence

20-year base term ended Jun 26, 2026

How we calculated this date

Sources