Patent
   D431647
Priority
Sep 06 1996
Filed
Sep 06 1996
Issued
Oct 03 2000
Expiry
Oct 03 2014
Assg.orig
Entity
unknown
48
27
n/a
The ornamental design for a personal respiratory protection device having an exhalation valve, as shown and described.

FIG. 1 is a perspective view of a personal respiratory protection device having an exhalation valve 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.

Curran, Desmond T., Henderson, Christopher P., Dyrud, James F., Bryant, John W.

Patent Priority Assignee Title
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D899585, Oct 12 2017 JSP LIMITED Respiratory mask
D900306, Sep 16 2016 3M Innovative Properties Company Valve cover
D925724, Oct 12 2017 JSP LIMITED Respiratory mask
D935012, Mar 03 2020 Mask
D936208, Apr 01 2020 Respiratory mask
ER2548,
ER2602,
ER9183,
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Sep 06 19963M Innovative Properties Company(assignment on the face of the patent)
Nov 25 1996DYRUD, JAMES F Minnesota Mining and Manufacturing CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0083350882 pdf
Dec 23 1996HENDERSON, CHRISTOPHER P Minnesota Mining and Manufacturing CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0083350882 pdf
Dec 23 1996BRYANT, JOHN W Minnesota Mining and Manufacturing CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0083350882 pdf
Jan 15 1997CURRAN, DESMOND T Minnesota Mining and Manufacturing CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0083350882 pdf
Apr 10 2000Minnesota Mining and Manufacturing Company3M Innovative Properties CompanyASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0107680808 pdf
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