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. 07, 1977
Filed:
Jun. 04, 1975
Applicant:
Inventors:
Shigetake Sato, Kamakura, JA;
Suminobu Kurahashi, Yokohama, JA;
Toru Okuyama, Yokohama, JA;
Noboru Hamada, Yokohama, JA;
Assignee:
Bridgestone Tire Company Limited, Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
260 / ; 260 / ;
Abstract
Method for the preparation of a foam polyamide in which the lactam together with a basic catalyst at a temperature above the melting point of the lactam is mixed with the promoter and foaming agent in a mixing vessel at ambient temperature while subjecting the mix to violent agitation to initiate polymerization, and the mix is discharged into a container for completion of the reaction before polymerization is more than 10% complete.