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:
Jul. 15, 1980
Filed:
Feb. 06, 1978
Applicant:
Inventors:
David L Ruff, Torrance, CA (US);
N Gokul Nath, Carson, CA (US);
Assignee:
Grefco, Inc., Bala Cynwyd, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
252 62 ; 427215 ; 427220 ; 427221 ;
Abstract
Thermal insulation of particulate expanded perlite that forms a low density, settle-resistant mass due to the coating of the perlite particles with a material rendering the individual particles slightly tacky.