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

Patent Owner(s)

Patent Owner	Address
PILKINGTON BROTHERS LIMITED	ST HELENS

International Classification(s)

• C03B:MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR ....

• 1981 Application Filing Year
• C03B Class
• 265 Applications Filed
• 2 Patents Issued To-Date
• 0.76 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Cross, Raymond P	Preston, GB2	2	39
# of filed Patents : 2 Total Citations : 39
Simpkin, Gordon T	Ormskirk, GB2	6	247
# of filed Patents : 6 Total Citations : 247

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Patent Citation Ranking

• 21 Citation Count
• C03B Class

• 0 % this patent is cited more than
• 42 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: 4372774

Thermal treatment of glass

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Abstract

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The thermal treatment of glass is effected by contacting the glass, when it is hot, with a gas-fluidized mixture of particulate materials, at least one of which is selected to have gas-generating properties when heated by the hot glass. The materials are mixed in selected pre-determined proportions which impart to the mixture a thermal capacity and flowability which are such that a required thermal treatment is achieved. The method is particularly suitable for the thermal toughening of glass sheets for vehicle windscreens.

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Description

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Claims

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Claims data not available

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Legal Events

 

• FP1987
• LAPS1987
• STCH1987
• FEPP1986
• I1983
• F1981
• PD1978

Date	Code	Event	Description
Feb 08, 1987	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Feb 08, 1987
Feb 08, 1987	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Feb 08, 1987	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Sep 12, 1986	FEPP	FEE PAYMENT PROCEDURE	free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
Feb 08, 1983	I	Issuance
Jul 21, 1981	F	Filing
Aug 17, 1978	PD	Priority Date