Unidirectional valve

Description

FIG. 1 is a front perspective view of a unidirectional valve, showing the new design.

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side elevational view being the mirror image of the right side elevational view;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design.

Claims

CLAIM The ornamental design for a unidirectional valve, as shown and described.

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Inventors:	Xue; Thomas J. (St. Paul, MN), Domroese; Michael K. (Woodbury, MN), Martin; Philip G. (Forest Lake, MN), Blomberg; David M. (Lino Lakes, MN), Abel; Nathan A. (Minneapolis, MN)
Applicant:	Name City State Country Type Xue; Thomas J. Domroese; Michael K. Martin; Philip G. Blomberg; David M. Abel; Nathan A. St. Paul Woodbury Forest Lake Lino Lakes Minneapolis MN MN MN MN MN US US US US US
Assignee:	3M Innovative Properties Company (St. Paul, MN)
Appl. No.:	D/352,087
Filed:	December 16, 2009

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Current U.S. Class:	D23/248
Current International Class:	2301
Field of Search:	;D23/233-237,244-249,259-269,310 ;128/206.12,206.15,206.21,206.28,207.12

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References Cited [Referenced By]

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	0756881		Feb 1997		EP
	000875778-0001		Mar 2008		EP
	WO 93/24181		Dec 1993		WO
	WO 00/01737		Jan 2000		WO
	WO 01/28634		Apr 2001		WO

Other References

Wente, Van A., Superfine Thermoplastic Fibers; Industrial and Engineering Chemistry, vol. 48, No. 8, pp. 1342-1346 (Aug. 1956). cited by applicant . Naval Research Laboratories, published May 25, 1954, entitled Superfine Organic Fibers by Wente, Van A., Boone, C.D., and Fluharty, E.L., 22 pages. cited by applicant . Niosh Procedure No. PCT-APR-STP-0004, Revision 1.1, dated Jun. 3, 2005; Determination of Exhalation Valve Leakage Test, Air-Purifying Respirators Standard Testing Procedure, 9 pages. cited by applicant . 3M Occupational Health and Environmental Safety Division Test Method, CPC Valve Vacuum Leak Test; OTM-20189/4, Effective Date Jan. 17, 2006, 3 pages. cited by applicant . Photographs of 3M.TM. Cool Flow.TM. Valve, available at least as early as Dec. 16, 2008, 2 pages. cited by applicant . 3M.TM. Cool Flow.TM. Valve Product Information, 2001, 4 pages. cited by applicant.

Primary Examiner: Rademaker; Garth
Attorney, Agent or Firm: Einerson; Nicole J.