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. 09, 1999
Filed:
Jun. 18, 1997
Applicant:
Inventors:
Alexander K Andrianov, Belmont, MA (US);
Mark P LeGolvan, West Roxbury, MA (US);
Yuri Svirkin, Belmont, MA (US);
Sameer S Sule, Marlboro, MA (US);
Assignee:
Virus Research Institute, Inc., Cambridge, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423300 ; 423265 ; 528168 ;
Abstract
A method for producing a polyorganophosphazene, such as, for example, poly�di(carboxylatophenoxy)phosphazenel!, from polydichlorophosphazene. The polydichlorophosphazene is reacted with at least one nucleophilic reagent at a defined molar ratio of the at least one nucleophilic reagent to the polydichlorophosphazene. Such process results in the production of a polyorganophosphazene having a molecular weight within a desired range.