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:
Nov. 20, 1979
Filed:
Apr. 20, 1978
Applicant:
Inventor:
John W Fieldhouse, Mogadore, OH (US);
Assignee:
The Firestone Tire & Rubber Company, Akron, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423300 ;
Abstract
A process for the purification of crude chlorophosphazene involves the use of an intermediate purification stage in which the crude chlorophosphazene is subjected to at least two water-washings, following which a final purification step is conducted utilizing a conventional chlorophosphazene purification procedure, such as recrystallization, sublimation, distillation, or melt-filtering and at least a very high purity cyclic chlorophosphazene trimer is then recovered. In a preferred process, the crude chlorophosphazene is subjected to three water-washings prior to the final purification step.