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Honsthu Chemical patent US12612393B2 for benzoxazine resin compounds

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Granted patents in USPTO classification C07D, covering heterocyclic organic compounds: the chemical core of most small-molecule drugs. Around 160 grants a month. Unlike applications, grants are enforceable. This feed is the best public-domain signal of which small-molecule compositions have just become defensible IP, which matters for generic entry timing, freedom-to-operate opinions, and competitive intelligence. Watch this if you practice pharma IP law, manage a drug discovery patent portfolio, advise on compound licensing, or scout ANDA opportunities as brand drugs approach loss of exclusivity. Recent grants cover apalutamide process improvements and bioactive phenolate ionic complexes.

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Apr 28, 2026

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Benzoxazine compound, resin raw material composition containing the same, curable resin composition, and cured product thereof

Grant US12612393B2 Kind: B2 Apr 28, 2026

Assignee

HONSHU CHEMICAL INDUSTRY CO., LTD.

Inventors

Yoshimi Utaka

Abstract

A benzoxazine compound is represented by general formula (1):
wherein R1 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R2 represents a divalent group having 1 to 10 carbon atoms, and X represents a single bond, an oxygen atom, a sulfur atom, a sulfonyl group, a carbonyl group, or a divalent group represented by general formula (1a) or general formula (1b), and

wherein R3 and R4 each independently represent hydrogen, an alkyl group having 1 to 10 carbon atoms, an alkyl halide group having 1 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms, R3 and R4 are optionally bonded to each other to together form a cycloalkylidene group having 5 to 20 carbon atoms, Ar1 and Ar2 each independently represent an aryl group having 6 to 12 carbon atoms, and * represents a bonding position.

CPC Classifications

C07D 413/10 C07D 265/16 C08J 7/12 C08K 5/357 C08L 101/00

Filing Date

2022-01-24

Application No.

18262295

Claims

11

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