Grill pattern on air filter inlet

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Description

FIG. 1 is a perspective view of a grill pattern on an air filter inlet showing our new design.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof; and,

FIG. 4 is a side view thereof, all other side views being the same.

The broken line showing forms no part of the claimed design.

Claims

The ornamental design for a grill pattern on an air filter inlet, as shown and described.

Referenced Cited
U.S. Patent Documents
2021086 November 1935 Oskamp
2642061 June 1953 Boyer
4088461 May 9, 1978 Brauer
4549543 October 29, 1985 Moon
4756308 July 12, 1988 Ryback
4971052 November 20, 1990 Edwards
5036844 August 6, 1991 Pouchot et al.
D352551 November 15, 1994 Andersson
D408907 April 27, 1999 Moreno
5906203 May 25, 1999 Klockseth et al.
6176239 January 23, 2001 Grove et al.
Foreign Patent Documents
3818295 July 1989 DE
0 108 560 May 1984 EP
0 164 946 December 1985 EP
0 078 110 May 1986 EP
0 352 938 October 1993 EP
572847 June 1924 FR
WO 83/00632 March 1983 WO
WO 96/29116 September 1996 WO
Other references
  • Lab Safety Supply “MSA Ultra Elite” Full face respirator p. 296 @1999.*
  • Domestic Preparedness—Powered Air Protection for First Responders C420 Mil-Spec PAPR; SCOTT a Scott Technologies Company (dated Sep. 1999) (a four page brochure).
Patent History
Patent number: D456505
Type: Grant
Filed: Aug 3, 2000
Date of Patent: Apr 30, 2002
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Jon R. Wolf (Woodbury, MN), Paul K. Johnson (St. Paul, MN), Brian S. McGinley (Woodbury, MN), David M. Castiglione (Hudson, WI), Benjamin J. Cullen (London), Raymond Odell (Brookmans Park)
Primary Examiner: Ian Simmons
Attorney, Agent or Law Firm: Michaele A. Hakamaki
Application Number: 29/127,308
Classifications
Current U.S. Class: Mask (D24/110.1); Including Eye Shield (5) (D24/110.2); Helmet Type (D24/110.3)
International Classification: 2902;