End-tidal carbon monoxide monitor filter

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Description

FIG. 1 is a front perspective view of an end-tidal carbon monoxide monitor filter showing our new design;

FIG. 2 is a front elevational view of the filter as seen from the left side of FIG. 1;

FIG. 3 is a rear elevational view as seen from the rear of FIG. 1;

FIG. 4 is a side elevational view as seen from the rear of FIG. 1;

FIG. 5 is a bottom plan view of the filter unit of FIG. 4; and,

FIG. 6 is a front perspective view of a second embodiment of an end-tidal carbon monoxide monitor filter showing our new design.

Referenced Cited
U.S. Patent Documents
3960142 June 1, 1976 Elliott et al.
3977394 August 31, 1976 Jones et al.
4210137 July 1, 1980 Henkin
4304578 December 8, 1981 Hakala et al.
4423739 January 3, 1984 Passaro
4456014 June 26, 1984 Buck et al.
4831024 May 16, 1989 Vreman et al.
4870961 October 3, 1989 Barnard
4886528 December 12, 1989 Aaltonen et al.
4892095 January 9, 1990 Nakhgevany
4924860 May 15, 1990 Larsen et al.
4968887 November 6, 1990 Wong
5000175 March 19, 1991 Pue
5003985 April 2, 1991 White et al.
5031613 July 16, 1991 Smith et al.
5293875 March 15, 1994 Stone
Foreign Patent Documents
9325142 December 1993 WOX
Other references
  • Yeung et al. "Automatic End Expiratory Air Sampling Device for breath Hydrogen Test in Infants", The Lancet, vol. 337, pp. 90-93 Jan. 1991. Product Literature-Z-World Engineering Little Giant Miniature Microcontroller (One page). Product Literature-Servomex Mode 1505 Co.sub.2 Infrared Transducer brochure (2 pages) and technical note (9 pages) Jul. 1991. Product literature-KNF Diaphragm Micro Pump Type NMP 02 (2 pages).
Patent History
Patent number: D354808
Type: Grant
Filed: Jan 21, 1993
Date of Patent: Jan 24, 1995
Assignee: Natus Medical Incorporated (San Carlos, CA)
Inventors: Neil J. Sheehan (Palo Alto, CA), Scott R. Rouw (Union City, CA), Robert T. Stone (Sunnyvale, CA)
Primary Examiner: A. Hugo Word
Assistant Examiner: I. Simmons
Law Firm: Davis Hoxie Faithfull & Hapgood
Application Number: 0/3,880