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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
THE UPJOHN COMPANY	KALAMAZOO MICHIGAN 49001

International Classification(s)

• A61K:PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOS....
• C07D:HETEROCYCLIC COMPOUNDS

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Aristoff, Paul A	Kalamazoo, MI	26	752
# of filed Patents : 26 Total Citations : 752
Palmer, John R	Kalamazoo, MI	63	508
# of filed Patents : 63 Total Citations : 508
Romero, Donna L	Kalamazoo, MI	69	752
# of filed Patents : 69 Total Citations : 752

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Patent Citation Ranking

• 9 Citation Count
• A61K Class

• 10.31 % this patent is cited more than
• 29 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

Full Text

US Patent No: 4725336

Refiner apparatus with integral steam separator

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Abstract

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A pressurized disc type refiner having parallel discs housed inside a pressurized chamber and a fluid conveying passageway for removing refined fibrous material entrained in steam is equipped with a second fluid conveying passageway. Fins on the one of the rotating discs impede the entrance of refined fibrous material into the second passageway by centrifugal force so that the steam conveyed in that passageway will be substantially free of entrained fibrous material.

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Description

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Claims

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Legal Events

 

• STCH2018
• FP2000
• LAPS2000
• REMI1999
• FPAY1995
• FPAY1991
• FEPP1990
• I1988
• FEPP1987
• AS1987
• AS1986
• F1985
• PD1985

Date	Code	Event	Description
Jan 31, 2018	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Feb 16, 2000	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Feb 16, 2000
Feb 13, 2000	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Sep 07, 1999	REMI	MAINTENANCE FEE REMINDER MAILED
Jun 08, 1995	FPAY	FEE PAYMENT	year of fee payment: 8
Jul 31, 1991	FPAY	FEE PAYMENT	year of fee payment: 4
Dec 07, 1990	FEPP	FEE PAYMENT PROCEDURE	free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
Feb 16, 1988	I	Issuance
Nov 01, 1987	FEPP	FEE PAYMENT PROCEDURE	free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
Oct 29, 1987	AS	ASSIGNMENT	free format text: MERGER;ASSIGNOR:SWM CORPORATION, MERGED INTO BAUER BROS. CO. CHANGED TO;REEL/FRAME:004810/0977 Owner name: SPROUT-BAUER, INC., Effective Date: Oct 29, 1987
Aug 05, 1986	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KOPPERS COMPANY, INC., A CORP OF DE;REEL/FRAME:004647/0152 Owner name: SWM CORPORATION, STAMFORD, CT A CORP OF DE Effective Date: Aug 05, 1986
Jan 31, 1985	F	Filing
Jan 31, 1985	PD	Priority Date