METHOD OF REDUCING PITCH IN PULPING AND PAPERMAKING - Patent 0374196

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EP 0 374 196 A1

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(43)	Date of publication:
	27.06.1990 Bulletin 1990/26

(21)	Application number: 89901770.0

(22)	Date of filing: 06.01.1989

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International Patent Classification (IPC):

D21H 17/ 46^{( . )}
D21H 21/ 02^{( . )}
D21H 27/ 00^{( . )}

D21H 17/ 63^{( . )}
D21H 23/ 10^{( . )}

(86)	International application number:
	PCT/US1989/000025

(87)	International publication number:
	WO 1989/006294 (13.07.1989 Gazette 1989/15)

(84)	Designated Contracting States:
	AT BE CH DE FR GB IT LI LU NL SE

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Priority:

07.01.1988 US 19880141495
21.12.1988 US 19880287866

(71)	Applicant: CYPRUS INDUSTRIAL MINERALS COMPANY
	Denver, CO 80112 (US)

(72)	Inventors:
	LAMAR, Richard, Syeb Littleton, CO 80125 (US) PRATT, William, Edmund Westlake Village, CA 91362 (US) ROEDER, Robert, Edward Parker, CO 80134 (US) WEBER, Kenneth, Earl Pacific Palisades, CA 90272 (US)

(74)	Representative: Williams, Trevor John, et al
	J.A. KEMP & CO. 14 South Square Gray's Inn London WC1R 5EU London WC1R 5EU (GB)

(54)	METHOD OF REDUCING PITCH IN PULPING AND PAPERMAKING