Integrated Automatic Telephone Switch

US 8,259,973 Term ended

Overview Sources & methods

Term ended Oct 9, 2021 · Medium confidence

Computed 20-year base term

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

USPTO later recorded it as expired for non-payment on Oct 7, 2024.

Held by Starkey Laboratories, Inc.

Filed Jun 26, 2007 as application 11/768,707 · Granted Sep 4, 2012

Base term plus 1363 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer

Today

20 years from filing

Term ended Oct 9, 2021

2000 2026

Clock starts
Sep 11, 2000

Term ended
Oct 9, 2021

Granted
Sep 4, 2012

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

1,363

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

Capped

Terminal disclaimer

Resolved from the filed document, referencing US 7,248,713.

2 of 2

Maintenance fees paid

Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.

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 Sep 11, 2000, when the earliest non-provisional application in its chain was filed (this one was filed Jun 26, 2007); a parent in its chain could not be resolved (the next row)	Sep 11, 2020	High confidence
Continuity chain	A parent in the chain could not be resolved	dated from this application's own claim	Medium confidence
Patent term adjustment	+1363 days, USPTO patent term adjustment record	Jun 5, 2024	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 7,248,713)	capped to Oct 9, 2021	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	2 of 2 maintenance fees paid	term ended	High confidence
USPTO status record	Recorded as expired for non-payment on Oct 7, 2024, after the term ended	no change	High confidence
Computed term end	The steps above, in order	Oct 9, 2021	Medium 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.

Integrated Automatic Telephone Switch

Term ended Oct 9, 2021 · Medium confidence

20-year base term ended Sep 11, 2020

How we calculated this date

Sources