The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 1987
Filed:
Feb. 04, 1969
Joseph Epstein, Baltimore, MD (US);
Harry O Michel, Towson, MD (US);
Robert E Plapinger, Baltimore, MD (US);
Joseph H Fleisher, Baltimore, MD (US);
John J Callahan, Baltimore, MD (US);
Bernard J Jandorf, Baltimore, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
The compounds of S-(2-dialkylaminoalkyl) alkyl phosphonothioic acids and hod of preparing said compounds possessing anticholinesterase activity comprising an aqueous solution which comprises dialkylaminoalkyl chloride salts which are converted to their corresponding dialkylmonoalkyl ammonium ions and alkylphosphonothioic acids forming a reaction mixture. The latter mixture is placed on a cation exchange resin with subsequent addition of water as an eluting agent giving rise to fractions containing the desired compounds.