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:
Feb. 22, 1977
Filed:
Mar. 18, 1971
Applicant:
Inventors:
Friedrich Krueger, Edingen, DT;
Lieselotte Bauer, Bad Duerkheim, DT;
Assignee:
Joh. A. Benckiser GmbH, Ludwigshafen am Rhein, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
2605025 ;
Abstract
Pure, crystalline nitrilo tris-(methylene phosphonic acid) is produced in a high yield by reacting lower aliphatic acid amides with formaldehyde and phosphorus trihalogenide, preferably phosphorus trichloride.