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:
Jun. 08, 1976
Filed:
Sep. 20, 1974
Applicant:
Inventor:
Franz J Brodmann, Philadelphia, PA (US);
Assignee:
General Refractories Company, Bala Cynwyd, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09C / ; C04B / ;
U.S. Cl.
CPC ...
1062 / ; 106D / ; 106 / ; 2523 / ;
Abstract
Perlite reduced to a particle size of less than 200 mesh in a binder of aqueous sodium ligno-sulfonate is expanded while suspended in a gaseous medium in a fluidized state at temperatures ranging from 1800.degree. to 2200.degree.F. for a period of 30 to 60 seconds. The resultant microspheres have excellent physical properties and are suited to use as fillers for resins.