DENSO Marston Ltd.

10 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

Sep 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 Feb 20, 2027
The maintenance fee for Header plate for a heat exchanger (US 10,386,129) comes due Feb 20, 2027. Unpaid by Aug 20, 2027, it lapses early.
1 fee due Jul 26, 2027
The maintenance fee for Heat exhanging apparatus (US 9,243,846) comes due Jul 26, 2027. Unpaid by Jan 26, 2028, 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.

Showing 1 to 10 of 10

Patent	Title	Status	Expires	Confidence
US 9,022,100	Adjustable tank for bar-plate heat exchanger In force Term ends Sep 26, 2033 · From the USPTO record	In force	Term ends Sep 26, 2033	From the USPTO record
US 9,243,846	Heat exhanging apparatus In force Term ends Jul 31, 2034 · From the USPTO record	In force	Term ends Jul 31, 2034	From the USPTO record
US 10,077,954	Heat exchanger assembly In force Term ends Apr 4, 2035 · From the USPTO record	In force	Term ends Apr 4, 2035	From the USPTO record
US 10,677,144	Heat exchanger system In force Term ends Jan 20, 2037 · From the USPTO record	In force	Term ends Jan 20, 2037	From the USPTO record
US 10,386,129	Header plate for a heat exchanger In force Term ends May 31, 2037 · From the USPTO record	In force	Term ends May 31, 2037	From the USPTO record
US 10,876,796	Heat exchanger In force Term ends Nov 29, 2037 · From the USPTO record	In force	Term ends Nov 29, 2037	From the USPTO record
US 10,809,018	Mounting arrangement for stacked heat exchanger assembly In force Term ends May 27, 2038 · From the USPTO record	In force	Term ends May 27, 2038	From the USPTO record
US 10,948,248	Heat exchanger assembly and method for mounting a heat exchanger In force Term ends Jun 12, 2039 · From the USPTO record	In force	Term ends Jun 12, 2039	From the USPTO record
US 11,585,604	Heat exchanger In force Term ends Jan 29, 2041 · From the USPTO record	In force	Term ends Jan 29, 2041	From the USPTO record
US 12,123,663	Heat Exchanger In force Term ends Nov 4, 2041 · High confidence	In force	Term ends Nov 4, 2041	High confidence

Also on record, not counted in the 10: 2 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.

3 no status recorded

List them