Luminamask Co., Ltd.

9 patents currently held · Updated Nov 14, 2026

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

Ending by 2030

Jan 2042

Next term end

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036203720382039204020412042204320442045

Fee deadlines

No maintenance fee falls due on this company's record before Nov 14, 2027.

Recent changes

3 of the patents on this record were granted since Aug 16, 2026

Patents held now

Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.

Showing 1 to 9 of 9

Patent	Title	Status	Expires	Confidence
US 12,481,212	Blank Mask and Photomask Using the Same In force Term ends Jan 3, 2042 · Medium confidence	In force	Term ends Jan 3, 2042	Medium confidence
US 12,461,438	Blank Mask and Photomask Using the Same In force Term ends Dec 10, 2042 · High confidence	In force	Term ends Dec 10, 2042	High confidence
US 12,650,640	Blank Mask and Photomask Using the Same In force Term ends Sep 27, 2043 · High confidence	In force	Term ends Sep 27, 2043	High confidence
US 12,276,905	Blank Mask and Photomask Using the Same In force Term ends Dec 12, 2043 · High confidence	In force	Term ends Dec 12, 2043	High confidence
US 12,649,854	Method of Preparing Laminate and Laminate for Optical Use In force Term ends Sep 22, 2044 · High confidence	In force	Term ends Sep 22, 2044	High confidence
US 12,687,772	Shadow Mask and Method of Manufacturing Blank Mask Using the Same In force Term ends Nov 5, 2044 · High confidence	In force	Term ends Nov 5, 2044	High confidence
US 12,782,805	Method of Cleaning Substrate for Blank Mask, Substrate for Blank Mask, and Blank Mask Including the Same In force Term ends Jan 4, 2045 · High confidence	In force	Term ends Jan 4, 2045	High confidence
US 12,761,543	Blank Mask and Photomask Using the Same In force Term ends Mar 7, 2045 · High confidence	In force	Term ends Mar 7, 2045	High confidence
US 12,724,341	Photomask for Extreme Ultraviolet In force Term ends Apr 24, 2045 · High confidence	In force	Term ends Apr 24, 2045	High confidence

Also on record, not counted in the 9: 3 ended at full term. List them

Sources and methods

Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand. How this record was built

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

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