Sennics Co., Ltd.

22 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

Oct 2027

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.

2 fees due May 17, 2027
1 fee due Aug 2, 2027
The maintenance fee for Sulfur-containing palladium-carbon catalyst and method for preparing and using the same (US 9,248,443) comes due Aug 2, 2027. Unpaid by Feb 2, 2028, it lapses early.
1 fee due Oct 5, 2027
The maintenance fee for Solid base catalyst and method for making and using the same (US 9,302,259) comes due Oct 5, 2027. Unpaid by Apr 5, 2028, 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.

Patent	Title	Status	Expires	Confidence
US 8,349,230	Spherical rubber chemicals and the method for preparing the same In force Ends no later than Oct 15, 2027 · From the USPTO record	In force	Ends no later than Oct 15, 2027	From the USPTO record
US 8,066,919	Spherical rubber chemicals and the method for preparing the same In force Term ends Oct 14, 2028 · From the USPTO record	In force	Term ends Oct 14, 2028	From the USPTO record
US 8,206,596	Magnetic separation apparatus and method for recovery of solid material from solid-liquid mixture In force Term ends Oct 6, 2030 · From the USPTO record	In force	Term ends Oct 6, 2030	From the USPTO record
US 8,293,137	Solid acid catalyst and method for preparing and using the same In force Term ends Nov 10, 2030 · From the USPTO record	In force	Term ends Nov 10, 2030	From the USPTO record
US 9,725,403	Method for pretreating and using copper-based catalyst In force Ends no later than Jun 15, 2031 · From the USPTO record	In force	Ends no later than Jun 15, 2031	From the USPTO record
US 9,186,660	Solid acid catalyst and method for preparing and using the same In force Term ends Oct 24, 2031 · From the USPTO record	In force	Term ends Oct 24, 2031	From the USPTO record
US 9,006,489	Method for Pretreating and Using Copper-Based Catalyst In force Term ends Mar 21, 2032 · High confidence	In force	Term ends Mar 21, 2032	High confidence
US 9,302,259	Solid base catalyst and method for making and using the same In force Term ends Apr 26, 2032 · From the USPTO record	In force	Term ends Apr 26, 2032	From the USPTO record
US 9,248,443	Sulfur-containing palladium-carbon catalyst and method for preparing and using the same In force Term ends Jul 13, 2032 · From the USPTO record	In force	Term ends Jul 13, 2032	From the USPTO record
US 9,187,326	Process tank for producing insoluble sulfur In force Term ends Mar 9, 2034 · From the USPTO record	In force	Term ends Mar 9, 2034	From the USPTO record

10 of 22 patents shown.

Pro members see all 22.

Pro members: see all 22 patents

Also on record, not counted in the 22: 8 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

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