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:
Sep. 04, 1990
Filed:
Jul. 17, 1989
Botho Klossner, Hilterfingen, CH;
Paul Lortscher, Brenzikofen, CH;
Schweizerische Eidgenossenschaft, Thun, CH;
Abstract
The invention provides a process for the preparation of finely grained lead azide, in which aqueous solutions of lead nitrate and sodium azide are stirred in a vessel at constant temperature, characterized in that in a first process step the aqueous solution of lead nitrate and a small amount of an aqueous solution of sodium citrate are poured into the vessel, in a second process step, the aqueous solution of sodium azide is dosed into the vessel over a period of time of 30 to 40 minutes, the aqueous solutions poured into the vessel are agitated at a peripheral stirring speed of between 0.2 m/sec and 1.0 m/sec., and the constant temperature is set to a value of 50.degree. C. to 80.degree. C.