Kofulso Co., Ltd.

23 patents currently held · Updated Nov 15, 2026

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

Ending by 2030

Jul 2029

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 Feb 8, 2027
The maintenance fee for Sprinkler support frame coupling device (US 11,717,712) comes due Feb 8, 2027. Unpaid by Aug 9, 2027, it lapses early.
2 fees due Mar 8 to 15, 2027 · next Mar 8
1 fee due May 28, 2027
The maintenance fee for Bracket device for installing expansion tank (US 11,828,411) comes due May 28, 2027. Unpaid by Nov 29, 2027, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

1 term has ended since Aug 17, 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 7,878,464	Mounting structure of coupler for sprinkler In force Term ends Jul 22, 2029 · From the USPTO record	In force	Term ends Jul 22, 2029	From the USPTO record
US 7,878,555	Coupling device for circular pipes In force Term ends Aug 21, 2029 · From the USPTO record	In force	Term ends Aug 21, 2029	From the USPTO record
US 7,980,601	Coupler for corrugated pipe In force Term ends Sep 25, 2029 · From the USPTO record	In force	Term ends Sep 25, 2029	From the USPTO record
US 8,181,709	Mounting structure for sprinkler head In force Term ends Oct 28, 2030 · From the USPTO record	In force	Term ends Oct 28, 2030	From the USPTO record
US 8,303,001	Pipe connector In force Term ends Mar 9, 2031 · From the USPTO record	In force	Term ends Mar 9, 2031	From the USPTO record
US 8,474,199	Sprinkler mounting device In force Term ends Jul 17, 2031 · From the USPTO record	In force	Term ends Jul 17, 2031	From the USPTO record
US 8,500,079	Sprinkler mounting device In force Term ends Sep 2, 2031 · From the USPTO record	In force	Term ends Sep 2, 2031	From the USPTO record
US 8,910,655	Gas valve having automatically blocking means In force Term ends Jun 29, 2033 · From the USPTO record	In force	Term ends Jun 29, 2033	From the USPTO record
US 9,127,790	Coupler for corrugated pipe In force Term ends Aug 31, 2033 · From the USPTO record	In force	Term ends Aug 31, 2033	From the USPTO record
US 9,133,947	Excess flow shut-off device In force Term ends Nov 7, 2033 · From the USPTO record	In force	Term ends Nov 7, 2033	From the USPTO record

10 of 23 patents shown.

Pro members see all 23.

Pro members: see all 23 patents

Also on record, not counted in the 23: 5 lapsed for an unpaid fee · 1 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.

1 abandoned · 4 no status recorded

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