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US Patent 9127691 Compact scroll fan assembly

Patent 9127691 was granted and assigned to 3M on September, 2015 by the United States Patent and Trademark Office.

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Current Assignee

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Date of Patent

September 8, 2015

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Patent Application Number

132240310

Date Filed

September 1, 2011

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Patent Citations Received

US Patent 11992585 Electro-ionic devices for improved protection from airborne biopathogens

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US Patent 12059049 Protective visored helmet with disinfected air flow property

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US Patent 12017232 Electro-ionic mask devices for improved protection from airborne biopathogens

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US Patent 11992613 Impeller and motor assembly

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Patent Primary Examiner

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Patent abstract

A radial fan assembly for use in a powered air purifying respirator includes at least an impeller, a printed circuit board and a scroll casing. The scroll casing has a first and a second scroll casing element. The second scroll casing element includes at least a portion of the printed circuit board. When the radial fan assembly is used in a powered air purifying respirators, the respirator may also include components such as a filter assembly.

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