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:
May. 21, 1991
Filed:
May. 22, 1989
Applicant:
Inventors:
Yasunari Soda, Hachioji, JP;
Kozo Mochiji, Hachioji, JP;
Hiroaki Oizumi, Kokubunji, JP;
Takeshi Kimura, Higashimurayama, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F / ;
U.S. Cl.
CPC ...
430296 ; 430325 ; 430324 ; 430330 ; 430942 ; 430967 ; 430328 ; 522915 ;
Abstract
The method for production of a graft copolymer according to the present invention includes the step of adding to a base polymer capable of forming first radicals when irradiated with radiation an additive capable of combining with said first radicals to form second radicals stable against oxygen, the step of irradiating said base polymer containing the additive with radiation, and the step of introducing a monomer under an atmosphere free from oxygen, thereby to graft copolymerize said irradiated base polymer and said monomer.