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:
Jun. 29, 1976
Filed:
Jul. 03, 1972
Applicant:
Inventors:
Ronald Leroy Casebier, Shelton, WA (US);
Karl David Sears, Shelton, WA (US);
Assignee:
International Telephone and Telegraph Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07G / ;
U.S. Cl.
CPC ...
2602365 ; 2603452 ; 2604735 ; 71 23 ;
Abstract
Polyphenolic components of coniferous tree barks are reacted with a concentrated aqueous solution containing ammonia and sulfur dioxide to produce aminated sulfite reaction products having high nitrogen contents. The products have a number of valuable applications including utility in the agricultural field. The reaction takes place at temperatures of 130.degree. - 190.degree.C., the ratio of NH.sub.3 /bark is within the range of 0.2 - 1.2 and ratio of SO.sub.2 /bark is within the range of 0.25 - 0.4, on a weight basis.