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:
Jan. 22, 1991
Filed:
Oct. 16, 1989
Lionel Bonneau, Salindres, FR;
Rhone-Poulenc Chimie, Courbevoie, FR;
Abstract
Organotin fluorides, notably dialkyltin difluorides, well adpated for the manufacture of coated insulating glassware and having controlled morphology, are prepared by reacting a stannic compound, e.g., an organotin chloride, with a fluorinating agent, e.g., hydrofluoric acid or an ammonium fluoride, admixing the organotin fluoride thus produced in a solvent that is immiscible with the fluorinating agent but which solubilizes the organotin fluoride therein, subsequently or simutaneously heating the solvent medium to a temperature sufficient to release unreacted fluorinating agent therefrom, and cooling such solvent medium and thereby crystallizing therefrom an organotin fluoride having a controlled morphology, e.g., well defined platelets having a characteristic DTA spectrum.