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:
Nov. 10, 1998
Filed:
Feb. 27, 1997
Applicant:
Inventor:
Yoshihiro Hori, Shimizu, JP;
Assignee:
Du Pont Mitsui Fluorochemicals, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02C / ;
U.S. Cl.
CPC ...
241 16 ; 241 21 ; 241 22 ;
Abstract
A method for the granulation of polytetrafluoroethylene powder comprises spraying a binder solution on the powder while the powder is stirred and ground. The binder solution is an aqueous surfactant solution having a surface tension of 25 dyne/cm or lower at 20.degree. C. and contains polytetrafluoroethylene colloidal particles.