Photomask Blank and Photomask

US 7,767,366 In force, term unresolved

Term ends no later than Jul 6, 2028 · Medium confidence

Computed 20-year base term

In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.

Held by Toppan Photomask Co.,Ltd.

Filed Mar 8, 2007 as application 11/715,346 · Granted Aug 3, 2010

Base term plus 486 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Ends no later than Jul 6, 2028

2007 2028

Clock starts
Mar 8, 2007

Ends no later than
Jul 6, 2028

Granted
Aug 3, 2010

base term patent term adjustment 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

486

Days of term adjustment

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

Unresolved

Terminal disclaimer

On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.

3 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.

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 Mar 8, 2007, when this application, 11/715,346, was filed	Mar 8, 2027	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+486 days, USPTO patent term adjustment record	Jul 6, 2028	High confidence
Terminal disclaimer cap	Disclaimer on file (approved), reference document not resolved	no cap applied, and none guessed	Medium confidence
Patent term extension	None on file	no change	High confidence
Fee events	3 of 3 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	no later than Jul 6, 2028	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

This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. Related patents and pending applications may cover overlapping subject matter.

In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.

Photomask Blank and Photomask

Term ends no later than Jul 6, 2028 · Medium confidence

20-year base term ends Mar 8, 2027

How we calculated this date

Sources