Respiratory protection mask

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of a respiratory protection mask showing the new design.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a top elevational view thereof.

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

FIG. 6 is a right elevational view thereof. The left side is a mirror image of the right side.

Referenced Cited
U.S. Patent Documents
RE24549 October 1958 Haliczer
D326541 May 26, 1992 McBrearty, Jr.
D347298 May 24, 1994 Japuntich et al.
D347299 May 24, 1994 Bryant et al.
D380545 July 1, 1997 Nozaki et al.
1987922 January 1935 Blatt
2012505 August 1935 Goldsmith
2029947 February 1936 Schmitt et al.
2565124 August 1951 Durborow
2752916 July 1956 Haliczer
3288138 November 1966 Sachs
3971369 July 27, 1976 Aspelin et al.
4248220 February 3, 1981 White
4417575 November 29, 1983 Hilton et al.
4628927 December 16, 1986 Wart
4643182 February 17, 1987 Klein
4827924 May 9, 1989 Japuntich
4941470 July 17, 1990 Hubbard et al.
5035006 July 30, 1991 Hetz et al.
5322061 June 21, 1994 Brunson
Foreign Patent Documents
2 103 491 GBX
Other references
  • Racal Health & Safety Product Literature for "Delta.TM. Disposable Respirators" (1993). Glendale Optical Company Product Literature for "Glendale Respiratory Protection" (Feb. 1983).
Patent History
Patent number: D424688
Type: Grant
Filed: Nov 7, 1997
Date of Patent: May 9, 2000
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: John W. Bryant (High Shincliffe), Christopher P. Henderson (Durham), Desmond T. Curran (Durham), James F. Dyrud (New Richmond, WI)
Primary Examiner: Stella Reid
Attorney: Karl G. Hanson
Application Number: 0/79,353
Classifications
Current U.S. Class: D24/1101
International Classification: 2902;