Respirator filter
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Description
The broken lines in the drawings depict portions of the respirator filter that form no part of the claimed design.
Claims
The ornamental design for a respirator filter, as shown and described.
Referenced Cited
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Patent History
Patent number: D887553
Type: Grant
Filed: Apr 4, 2018
Date of Patent: Jun 16, 2020
Assignee: 3M INNOVATIVE PROPERTIES COMPANY (St. Paul, MN)
Inventors: John S. Huberty (St. Paul, MN), Jennifer A. Chaisson (Kemptville), Gary E. Dwyer (Mallorytown), Denise L. Goddard (Woodbury, MN)
Primary Examiner: Lilyana Bekic
Application Number: 29/643,063
Type: Grant
Filed: Apr 4, 2018
Date of Patent: Jun 16, 2020
Assignee: 3M INNOVATIVE PROPERTIES COMPANY (St. Paul, MN)
Inventors: John S. Huberty (St. Paul, MN), Jennifer A. Chaisson (Kemptville), Gary E. Dwyer (Mallorytown), Denise L. Goddard (Woodbury, MN)
Primary Examiner: Lilyana Bekic
Application Number: 29/643,063
Classifications