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:
Dec. 20, 1983
Filed:
Mar. 23, 1983
Applicant:
Inventor:
Bruce W Sands, Malvern, PA (US);
Assignee:
PQ Corporation, Valley Forge, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106 75 ; 264 13 ; 264 15 ; 428402 ; 428325 ; 521 56 ; 521 60 ;
Abstract
More perfect, less porous hollow microspheres can be prepared by spray-drying dispersions of alkali metal silicate and 'polysalt' that contain certain organic liquids. The organics are water-miscible and have boiling points of 100.degree. C. or more. The solvent is added just prior to spray drying and the resulting product has fewer cracks and/or holes.