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

Patent Owner(s)

Patent Owner	Address
BAXTER INTERNATIONAL INC	ONE BAXTER PARKWAY DEERFIELD IL 60015
BAXTER HEALTHCARE SA (A CORPORATION OF SWITZERLAND)	HERTISTRASSE 2 CH-8304 WALLISELLEN

International Classification(s)

• G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Rothstein, Fred	Long Beach, CA	4	57
# of filed Patents : 4 Total Citations : 57
Woiszwillo, James E	Milford, MA	13	1065
# of filed Patents : 13 Total Citations : 1065

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Patent Citation Ranking

• 41 Citation Count
• G01N Class

• 93.10 % this patent is cited more than
• 28 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: 4526034

Krypton hygrometer

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Abstract

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An improved spectroscopic hygrometer includes a krypton-filled source tube that produces emissions at 123.58 nm for selective absorption by water vapor in a gaseous sample. The method for measuring water vapor density requires generation of ultraviolet radiation from a krypton source, receipt of the radiation by a detector, and passage of a gaseous sample through the radiation that is directed to the detector. The krypton radiation has been found to be an effective source for hygrometry purposes, and a practical improvement over prior hydrogen sources.

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Description

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Claims

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Legal Events

 

• FPAY1996
• FPAY1992
• FPAY1988
• FEPP1987
• I1985
• STCF1985
• F1984
• AS1984

Date	Code	Event	Description
Aug 05, 1996	FPAY	FEE PAYMENT	year of fee payment: 12
Aug 06, 1992	FPAY	FEE PAYMENT	year of fee payment: 8
Oct 31, 1988	FPAY	FEE PAYMENT	year of fee payment: 4
Nov 01, 1987	FEPP	FEE PAYMENT PROCEDURE	free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY
Jul 02, 1985	I	Issuance
May 01, 1985	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
May 07, 1984	F	Filing
May 07, 1984	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:CAMPBELL, GAYLON S.;TANNER, BERTRAND D.;GAUTHIER, ROBERT V.;REEL/FRAME:004258/0644;SIGNING DATES FROM 19840209 TO 19840423 Owner name: CAMPBELL SCIENTIFIC, INC.