Chemo Research, S.L.

10 patents currently held · Updated Nov 15, 2026

4 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.

Ending by 2030

Feb 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 Jan 9, 2027
The maintenance fee for Process for the preparation of the compound N-(3,5-dimethylphenyl)-N′-(2-trifluoromethylphenyl) guanidine (US 10,343,984) comes due Jan 9, 2027. Unpaid by Jul 9, 2027, it lapses early.
1 fee due Mar 15, 2027
The maintenance fee for Core sheath drug delivery devices (US 9,132,081) comes due Mar 15, 2027. Unpaid by Sep 15, 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 10 of 10

Patent	Title	Status	Expires	Confidence
US 9,132,081	Core sheath drug delivery devices In force Term ends Feb 13, 2033 · From the USPTO record	In force	Term ends Feb 13, 2033	From the USPTO record
US 9,872,829	Core sheath drug delivery devices In force Ends no later than Feb 13, 2033 · From the USPTO record	In force	Ends no later than Feb 13, 2033	From the USPTO record
US 9,718,795	1,4-cyclohexylamine derivatives and processes for the preparation thereof In force Term ends Oct 14, 2034 · From the USPTO record	In force	Term ends Oct 14, 2034	From the USPTO record
US 10,343,984	Process for the preparation of the compound N-(3,5-dimethylphenyl)-N′-(2-trifluoromethylphenyl) guanidine In force Term ends Aug 10, 2036 · From the USPTO record	In force	Term ends Aug 10, 2036	From the USPTO record
US 11,590,145	Vaginal Composition Comprising a Combination of Estrogen and Vitamin D In force Term ends Jul 20, 2037 · High confidence	In force	Term ends Jul 20, 2037	High confidence
US D1,137,660	Applicator for Implants In force Term ends Jul 28, 2041 · High confidence	In force	Term ends Jul 28, 2041	High confidence
US 12,409,141	New Modified Release Oral Contraceptive Composition In force Term ends Aug 13, 2041 · High confidence	In force	Term ends Aug 13, 2041	High confidence
US 12,409,142	New Modified Release Oral Contraceptive Composition In force Term ends Aug 13, 2041 · Low confidence	In force	Term ends Aug 13, 2041	Low confidence
US 12,478,630	Method for Treating Endometriosis and Providing Effective Contraception In force Term ends Aug 11, 2042 · High confidence	In force	Term ends Aug 11, 2042	High confidence
US 12,377,253	Applicator for implant insertion In force Term ends Oct 17, 2043 · From the USPTO record	In force	Term ends Oct 17, 2043	From the USPTO record

Also on record, not counted in the 10: 4 patents in force now held by others · 1 lapsed for an unpaid fee. 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.

5 pending · 2 abandoned · 3 no status recorded

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