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
| D534639 | January 2, 2007 | Zhang |
| D535371 | January 16, 2007 | Bushee |
| D668749 | October 9, 2012 | Thomas |
| D780900 | March 7, 2017 | Dichraff |
| D799015 | October 3, 2017 | Tang |
| D810906 | February 20, 2018 | Yoon |
| D829875 | October 2, 2018 | Stanhope |
| D835248 | December 4, 2018 | Echeverri |
| D840012 | February 5, 2019 | Zhou |
| D844766 | April 2, 2019 | Miao |
| D853544 | July 9, 2019 | Vu |
| D861145 | September 24, 2019 | Fang |
| D876599 | February 25, 2020 | He |
| 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)