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:
Feb. 02, 1982
Filed:
Jul. 14, 1980
Applicant:
Inventors:
David L Ruff, Torrance, CA (US);
Narikottile G Nath, Carson, CA (US);
Assignee:
Grefco, Inc., Bala Cynwyd, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428220 ; 106D / ; 156 622 ; 264123 ; 428403 ; 428404 ; 428405 ; 428407 ;
Abstract
Perlite board made from expanded perlite and a binder having the property of permanent tackiness in the dry state. The board may be made by expanding the perlite, adding a tacky resin emulsion to the perlite, drying the mixture and forming it into a board-like product.
Ruff, David. (1982). Perlite boards and method for making same (U.S. Patent No. 4313997). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4313997
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile