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

Patent Owner(s)

Patent Owner	Address
MONTEDISON S P A	I-20121 MILAN

International Classification(s)

• C08G:MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN B....

• 1989 Application Filing Year
• C08G Class
• 1244 Applications Filed
• 12 Patents Issued To-Date
• 0.97 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Fiore, Leonardo	Milan, IT	7	13
# of filed Patents : 7 Total Citations : 13
Maritano, Mauro	Como, IT	22	173
# of filed Patents : 22 Total Citations : 173
Motroni, Giuseppe	Novara, IT	6	345
# of filed Patents : 6 Total Citations : 345

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Patent Citation Ranking

• 1 Citation Count
• C08G Class

• 0 % this patent is cited more than
• 34 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: 5032673

Liquid-crystal copolyethers based on 7-oxa-bicyclo-(2,2,1)-heptane

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Abstract

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The present invention relates to copolyethers constituted by copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more cycloaliphatic ethers, comprising from 2 to 4 carbon atoms in their ring. These copolyethers show an anisotropic behavior in the molten state, and therefore are endowed with liquid-crystal properties.

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Description

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Claims

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Legal Events

 

• STCH2018
• FP1995
• LAPS1995
• REMI1995
• I1991
• F1989
• PD1986

Date	Code	Event	Description
Jan 29, 2018	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Jul 19, 1995	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Jul 19, 1995
Jul 16, 1995	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Feb 21, 1995	REMI	MAINTENANCE FEE REMINDER MAILED
Jul 16, 1991	I	Issuance
May 08, 1989	F	Filing
Sep 15, 1986	PD	Priority Date