US Patent 7262294 Photochromatic pyrano-1,3-oxazinonaphthalene derivatives
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Patent abstract
Photochromatic compounds belonging to the groups of chromenes and spiro-pyrans having general formula (I)
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US Patent 07262294 Photochromatic pyrano-1,3-oxazinonaphthalene derivatives US Patent 7262294 Photochromatic pyrano-1,3-oxazinonaphthalene derivatives
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Patent Number
0726229400
Patent Number
726229400
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Patent Jurisdiction
Patent Number
072622940
Date of Patent
August 28, 2007
0Patent Application Number
102574080
Date Filed
April 19, 2001
0Official Website
Patent Primary Examiner
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Infobox
Is a
Patent Jurisdiction
Patent Number
072622940
Date of Patent
August 28, 2007
0Patent Application Number
102574080
Date Filed
April 19, 2001
0Official Website
Patent Primary Examiner
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US Patent 07262294 Photochromatic pyrano-1,3-oxazinonaphthalene derivatives
Infobox
Is a
Patent jurisdiction
Patent number
07262294
Date of patent
August 28, 2007
Patent application number
10257408
Date Filed
April 19, 2001
Patent primary examiner
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