SG63675A1 - Naphthopyrans and photochromic articles - Google Patents

Naphthopyrans and photochromic articles

Info

Publication number
SG63675A1
SG63675A1 SG1996010941A SG1996010941A SG63675A1 SG 63675 A1 SG63675 A1 SG 63675A1 SG 1996010941 A SG1996010941 A SG 1996010941A SG 1996010941 A SG1996010941 A SG 1996010941A SG 63675 A1 SG63675 A1 SG 63675A1
Authority
SG
Singapore
Prior art keywords
naphthopyrans
photochromic articles
photochromic
articles
Prior art date
Application number
SG1996010941A
Inventor
David B Knowles
Van Barry Gemert
Anil Kumar
Original Assignee
Ppg Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/490,190 external-priority patent/US5656206A/en
Application filed by Ppg Industries Inc filed Critical Ppg Industries Inc
Priority to SG1996010941A priority Critical patent/SG63675A1/en
Publication of SG63675A1 publication Critical patent/SG63675A1/en

Links

SG1996010941A 1995-06-14 1996-10-23 Naphthopyrans and photochromic articles SG63675A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SG1996010941A SG63675A1 (en) 1995-06-14 1996-10-23 Naphthopyrans and photochromic articles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/490,190 US5656206A (en) 1995-06-14 1995-06-14 Substituted naphthopyrans
SG1996010941A SG63675A1 (en) 1995-06-14 1996-10-23 Naphthopyrans and photochromic articles

Publications (1)

Publication Number Publication Date
SG63675A1 true SG63675A1 (en) 1999-03-30

Family

ID=26665137

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996010941A SG63675A1 (en) 1995-06-14 1996-10-23 Naphthopyrans and photochromic articles

Country Status (1)

Country Link
SG (1) SG63675A1 (en)

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