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 Title: |
US6312811:
Photochromic naphtho [2,1-b]pyran compounds containing bithienyl or terthienyl substituents, process for their manufacture, and photochromic materials and articles obtained
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Frigoli, Michel; Marseille, France
Rebiere-Galy, Nicole; Paris, France
Moustrou, Corinne; Marseille, France
Samat, Andre; Marseille, France
Guglielmetti, Robert; Marseille, France
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| Assignee: |
Essilor International Compagnie Generale d'Optique, Charenton Cedex, France
other patents from ESSILOR INTERNATIONAL COMPAGNIE GENERALE D OPTIQUE (180585) (approx. 297)
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| Published / Filed: |
2001-11-06
/ 1999-07-08
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| Application Number: |
US1999000349686
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| IPC Code: |
Advanced:
B32B 17/10;
C07D 409/14;
C09K 9/02;
G02B 5/23;
IPC-7:
C03C 4/06;
C07D 407/14;
C07D 409/04;
C07D 409/14;
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| ECLA Code: |
C07D409/14; B32B17/10E40D4; C09K9/02;
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| U.S. Class: |
Current:
428/411.1;
052/204.5;
501/013;
548/525;
548/527;
549/059;
Original:
428/411.1;
052/204.5;
296/084.1;
296/146.1;
501/013;
548/525;
548/527;
549/059;
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| Field of Search: |
548/525,527
549/059
428/411.1,412,426,913
052/204.5
296/84.1,146.1
501/013
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| Priority Number: |
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| Abstract: |
The photochromic compounds of the invention correspond to the formula:in which Th2 represents a bithienyl group in one of the positions 5 to 10 of the naphthenic ring system system, R1 denotes a bithienyl or trithienyl group and R2 denotes a bithienyl, trithienyl, aryl, naphthyl, thienyl, furyl, pyrrolyl or N-alkylpyrrolyl group.
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| Attorney, Agent or Firm: |
Fulbright & Jaworski LLP ;
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| Primary / Asst. Examiners: |
Thibodeau, Paul; Zacharia, Ramsey
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| INPADOC Legal Status: |
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| Designated Country: |
AU BR EP JP
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| Family: |
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First Claim:
Show all 12 claims |
What is claimed is:
1. A photochromic compound having a [3H]naphtho-[2, 1-b]pyran structure and comprising at least one substituted or unsubstituted bithienyl group in one of the positions 5-10 of the naphthalene ring system of said structure and at least one substituted or unsubstituted bithienyl or terthienyl group in position 3 of said structure.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 34 U.S. patent(s) that reference this one
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