Clack Corporation

9 patents currently held · Updated Nov 15, 2026

3 more in force are now held by other companies

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

Recorded under 2 name spellings.

Ending by 2030

May 2033

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 9, 2026
The maintenance fee for Baffle plate for a water treatment device (US 9,051,196) comes due Dec 9, 2026. Unpaid by Jun 9, 2027, it lapses early.
1 fee due Jan 14, 2027
The maintenance fee for Distributor arrangement for a fluid treatment tank (US 9,079,783) comes due Jan 14, 2027. Unpaid by Jul 14, 2027, it lapses early.
1 fee due May 12, 2027
The maintenance fee for Fluid Treatment Tank Having a Distributor Plate (US 10,472,251) comes due May 12, 2027. Unpaid by Nov 12, 2027, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

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 9,051,196	Baffle plate for a water treatment device In force Term ends May 26, 2033 · From the USPTO record	In force	Term ends May 26, 2033	From the USPTO record
US 8,961,797	Water treatment system tank selector valve assembly In force Term ends Jun 25, 2033 · From the USPTO record	In force	Term ends Jun 25, 2033	From the USPTO record
US 9,079,783	Distributor arrangement for a fluid treatment tank In force Term ends Jun 27, 2033 · From the USPTO record	In force	Term ends Jun 27, 2033	From the USPTO record
US 10,472,251	Fluid Treatment Tank Having a Distributor Plate In force Ends no later than Apr 21, 2036 · Medium confidence	In force	Ends no later than Apr 21, 2036	Medium confidence
US 10,106,434	Fluid Treatment Tank Having a Distributor Plate In force Term ends Mar 31, 2037 · High confidence	In force	Term ends Mar 31, 2037	High confidence
US 12,415,233	Fluid treatment tank having a laser welded distributor plate In force Term ends May 8, 2039 · From the USPTO record	In force	Term ends May 8, 2039	From the USPTO record
US 11,059,727	Fluid treatment tank having air blocker In force Term ends Jul 12, 2039 · From the USPTO record	In force	Term ends Jul 12, 2039	From the USPTO record
US 12,090,573	Fluid treatment tank having a laser welded distributor plate In force Term ends Nov 22, 2041 · From the USPTO record	In force	Term ends Nov 22, 2041	From the USPTO record
US 12,297,129	Water treatment tank with conductivity monitor In force Term ends Oct 20, 2042 · From the USPTO record	In force	Term ends Oct 20, 2042	From the USPTO record

Also on record, not counted in the 9: 3 patents in force now held by others · 4 lapsed for an unpaid fee · 26 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.

2 no status recorded

List them