Air purifier
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Description
The portions of the air purifier in
Claims
The ornamental design for an air purifier, as shown and described.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
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Patent History
Patent number: D862673
Type: Grant
Filed: Jun 14, 2018
Date of Patent: Oct 8, 2019
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Xinchun Tang (Shanghai), Zijing Cao (Shanghai)
Primary Examiner: David G Muller
Assistant Examiner: Nathan M Johnston
Application Number: 29/653,371
Type: Grant
Filed: Jun 14, 2018
Date of Patent: Oct 8, 2019
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Xinchun Tang (Shanghai), Zijing Cao (Shanghai)
Primary Examiner: David G Muller
Assistant Examiner: Nathan M Johnston
Application Number: 29/653,371
Classifications
Current U.S. Class:
Air Cleaner (D23/364)