US Patent 8459200 Exposure indicating device
Patent 8459200 was granted and assigned to 3M on June, 2013 by the United States Patent and Trademark Office.
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Patent abstract
An exposure indicating device disposed in a respirator system. The exposure indicating device comprises a diffractive optical element. The exposure indicating device comprises a material having an index of refraction that changes as a function of exposure to a chemical vapor, where the exposure indicating device provides an optical signal that changes in optical property as a function of exposure to the chemical vapor.
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US Patent 08459200 Exposure indicating device US Patent 8459200 Exposure indicating device
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Patent Number
0845920000
Patent Number
845920000
Edits on 27 Mar, 2023
Golden AI
Infobox
Is a
Current Assignee
0
Patent Jurisdiction
Patent Number
084592000
Date of Patent
June 11, 2013
0Patent Application Number
129976500
Date Filed
June 15, 2009
0Patent Primary Examiner
Edits on 23 Sep, 2022
Golden AI
Infobox
Is a
Current Assignee
0
Patent Jurisdiction
Patent Number
084592000
Date of Patent
June 11, 2013
0Patent Application Number
129976500
Date Filed
June 15, 2009
0Patent Primary Examiner
Edits on 16 Dec, 2021
Golden AI
Edits made to:
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US Patent 08459200 Exposure indicating device
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
08459200
Date of patent
June 11, 2013
Patent application number
12997650
Date Filed
June 15, 2009
Patent primary examiner
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