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. 15, 1983
Filed:
Nov. 20, 1980
Central Glass Company, Limited, Yamaguchi, JP;
Abstract
An alkali monofluorophosphate expressed by the formula M.sub.2 PO.sub.3 F, where M represents Na or K, can readily be synthesized under a relatively mild reaction condition by making HF gas contact with powdery or fine granular M.sub.4 P.sub.2 O.sub.7 or M.sub.2 HPO.sub.4 placed in a reaction vessel and maintained at a temperature in the range from about 200.degree. C. to about 450.degree. C., and more preferably in the range of 280.degree.-360.degree. C. It is suitable to make HF gas continuously flow into and pass through the reaction vessel until the total quantity of HF flowed into the vessel amounts to 100 to 150% of the theoretical value for conversion of M.sub.4 P.sub.2 O.sub.7 or M.sub.2 HPO.sub.4 to M.sub.2 PO.sub.3 F.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile