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

Patent Owner(s)

Patent Owner	Address
NORAM ENGINEERING AND CONSTRUCTORS LTD	VANCOUVER BC V6C 1S4

International Classification(s)

• B01D:SEPARATION

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Cameron, Gordon M	4 Wellesbourne Crescent, Willowdale, Ontario, CA	32	223
# of filed Patents : 32 Total Citations : 223

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Patent Citation Ranking

• 18 Citation Count
• B01D Class

• 0 % this patent is cited more than
• 33 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: 5135611

Method and apparatus for combined spray drying and gas cleaning

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Abstract

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A combined spray dryer and gas filter vessel in which a solution containing sulphuric acid and solids, and a hot drying gas, are introduced vertically through the top of the vessel into a spray zone. Solids are removed at a single point at the bottom of the vessel. Filters located above the spray zone clean gas leaving the vessel, and the cleaned gas exits at the top of the vessel. The compact design reduces insulation requirements while avoiding condensation which would create corrosion and yet it provides good separation of solids from gases.

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Description

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Claims

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Claims data not available

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Legal Events

 

• STCH2018
• AS2005
• FP2004
• LAPS2004
• REMI2004
• AS2002
• FPAY2000
• FPAY1996
• AS1993
• I1992
• F1990
• PD1990

Date	Code	Event	Description
Jan 28, 2018	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Dec 16, 2005	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CECEBE TECHNOLOGIES INC.;REEL/FRAME:017586/0345 Owner name: NORAM ENGINEERING AND CONSTRUCTORS LTD., CANADA Effective Date: Dec 16, 2005
Aug 04, 2004	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Aug 04, 2004
Aug 04, 2004	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Feb 18, 2004	REMI	MAINTENANCE FEE REMINDER MAILED
Jun 26, 2002	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CAMERON, GORDON M.;REEL/FRAME:013506/0250 Owner name: CECEBE TECHNOLOGIES INC., CANADA Effective Date: Jun 26, 2002
Feb 02, 2000	FPAY	FEE PAYMENT	year of fee payment: 8
Feb 05, 1996	FPAY	FEE PAYMENT	year of fee payment: 4
Feb 04, 1993	AS	ASSIGNMENT	free format text: EFFECTIVE JUNE 4, 1992.;ASSIGNOR:CAMERON, GORDON M.;REEL/FRAME:006442/0663 Owner name: CECEBE TECHNOLOGIES INC., ONTARIO Effective Date: Feb 04, 1993
Aug 04, 1992	I	Issuance
May 25, 1990	F	Filing
May 25, 1990	PD	Priority Date