Self-Topcoating Resist for Photolithography

US 8,945,808 Term ended

Overview Sources & methods

Term ended Oct 31, 2024 · High confidence

Computed 20-year base term

Held by International Business Machines Corporation

Filed Apr 28, 2006 as application 11/380,731 · Granted Feb 3, 2015

Base term plus 999 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer

Today

20 years from filing

Term ended Oct 31, 2024

2006 2026

Clock starts
Apr 28, 2006

Term ended
Oct 31, 2024

Granted
Feb 3, 2015

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

999

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 7,193,023, US 8,003,309.

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 Apr 28, 2006, when this application, 11/380,731, was filed	Apr 28, 2026	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+999 days, USPTO patent term adjustment record	Jan 21, 2029	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 7,193,023, US 8,003,309)	capped to Oct 31, 2024	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	2 of 2 maintenance fees paid	term ended	High confidence
Computed term end	The steps above, in order	Oct 31, 2024	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.

Self-Topcoating Resist for Photolithography

Term ended Oct 31, 2024 · High confidence

20-year base term ended Apr 28, 2026

How we calculated this date

Sources