US Patent

US8147809 — Soft anticholinergic esters

Composition of Matter · Assigned to Individual · Expires 2027-03-26 · 1y remaining

Vulnerability score 35/100 Strong — defensible against typical IPR challenges

What this patent protects

This patent protects a class of soft anticholinergic ester compounds with specific chemical structures and configurations.

USPTO Abstract

Soft anticholinergic esters of the formulas: wherein R 1 and R 2 are both phenyl or one of R 1 and R 2 is phenyl and the other is cyclopentyl; R is C 1 -C 8 alkyl, straight or branched chain; and X − is an anion with a single negative charge; and wherein each asterisk marks a chiral center; said compound having the R, S or RS stereoisomeric configuration at each chiral center unless specified otherwise, or being a mixture thereof.

Drugs covered by this patent

Patent Metadata

Patent number
US8147809
Jurisdiction
US
Classification
Composition of Matter
Expires
2027-03-26
Drug substance claim
Yes
Drug product claim
Yes
Assignee
Individual
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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