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. 19, 1990
Filed:
Dec. 11, 1987
Applicant:
Inventors:
Toshihiko Kitaura, Saga, JP;
Akio Nakamura, Saga, JP;
Masayuki Sakamoto, Saga, JP;
Kouichi Takashima, Saga, JP;
Kiyotaka Hirakawa, Saga, JP;
Matao Mizota, Saga, JP;
Assignee:
Nitto Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
264 39 ; 106 386 ; 524156 ; 428286 ;
Abstract
A mold-cleaning composition and sheet comprising an uncured rubber composition comprising an uncured rubber and a curing agent, and at least one removal aid selected from imidazoles and imidazolines, and a method for cleaning a mold using the mold-cleaning sheet, are disclosed. The mold-cleaining sheet is suitably used to clean molding surfaces of a mold or to remove contaminants such as burr formed at peripheries thereof in the continuous production of semiconductor devices by transfer molding.