Cemco, LLC

73 patents currently held · Updated Nov 14, 2026

1 more in force is now held by another company

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

Previously recorded as California Expanded Metal Products Company (to 2022)

Ending by 2030

Jan 2028

Next term end

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036203720382039204020412042204320442045

Fee deadlines

Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.

1 fee due Dec 2, 2026
The maintenance fee for Fire-Rated Joint System (US 9,045,899) comes due Dec 2, 2026. Unpaid by Jun 2, 2027, it lapses early.
2 fees due Mar 8 to 10, 2027 · next Mar 8
2 fees due Apr 3 to 30, 2027 · next Apr 3
1 fee due Jul 9, 2027
The maintenance fee for Fire-Rated Joint Component and Wall Assembly (US 11,866,932) comes due Jul 9, 2027. Unpaid by Jan 10, 2028, it lapses early.
5 fees due Aug 6 to 20, 2027 · next Aug 6
4 fees due Sep 5 to 22, 2027 · next Sep 5

Which patents, and when each one lapses · Pro

Recent changes

1 of the patents on this record was granted since Aug 16, 2026
1 term has ended 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.

Patent	Title	Status	Expires	Confidence
US 7,617,643	Fire-rated wall construction product In force Term ends Jan 11, 2028 · From the USPTO record	In force	Term ends Jan 11, 2028	From the USPTO record
US 9,127,454	Fire-rated wall and ceiling system In force Ends no later than Jan 11, 2028 · From the USPTO record	In force	Ends no later than Jan 11, 2028	From the USPTO record
US 9,481,998	Fire-rated wall and ceiling system In force Ends no later than Jan 11, 2028 · From the USPTO record	In force	Ends no later than Jan 11, 2028	From the USPTO record
US 9,739,052	Fire-rated wall and ceiling system In force Ends no later than Jan 11, 2028 · From the USPTO record	In force	Ends no later than Jan 11, 2028	From the USPTO record
US 10,011,983	Fire-rated wall and ceiling system In force Ends no later than Jan 11, 2028 · From the USPTO record	In force	Ends no later than Jan 11, 2028	From the USPTO record
US 10,214,901	Fire-Rated Wall and Ceiling System In force Term ends Jan 11, 2028 · Medium confidence	In force	Term ends Jan 11, 2028	Medium confidence
US 10,619,347	Fire-rated wall and ceiling system In force Ends no later than Jan 11, 2028 · From the USPTO record	In force	Ends no later than Jan 11, 2028	From the USPTO record
US 11,802,404	Fire-rated wall and ceiling system In force Term ends Jan 11, 2028 · From the USPTO record	In force	Term ends Jan 11, 2028	From the USPTO record
US 7,950,198	Fire-rated wall construction product In force Term ends Jan 20, 2028 · From the USPTO record	In force	Term ends Jan 20, 2028	From the USPTO record
US 8,973,319	Two-Piece Track System In force Term ends Feb 28, 2028 · Medium confidence	In force	Term ends Feb 28, 2028	Medium confidence

10 of 73 patents shown.

Pro members see all 73.

Pro members: see all 73 patents

Also on record, not counted in the 73: 1 patent in force now held by others · 15 lapsed for an unpaid fee · 5 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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Published applications

US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.

3 pending · 5 no status recorded

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