Air purifier
Latest 3M Innovative Properties Company Patents:
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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| D535371 | January 16, 2007 | Bushee |
| D668749 | October 9, 2012 | Thomas |
| D780900 | March 7, 2017 | Dichraff |
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| D840012 | February 5, 2019 | Zhou |
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| 304987503 | January 2019 | CN |
Patent History
Patent number: D891599
Type: Grant
Filed: Apr 12, 2019
Date of Patent: Jul 28, 2020
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Man Li (Shanghai), Liliang Liu (Shanghai), Xuefeng Sun (Shanghai), Kin Hang Siu (Shanghai)
Primary Examiner: David G Muller
Application Number: 29/687,337
Type: Grant
Filed: Apr 12, 2019
Date of Patent: Jul 28, 2020
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Man Li (Shanghai), Liliang Liu (Shanghai), Xuefeng Sun (Shanghai), Kin Hang Siu (Shanghai)
Primary Examiner: David G Muller
Application Number: 29/687,337
Classifications
Current U.S. Class:
Air Cleaner (D23/364)