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 Title: |
US5658502:
Photochromic articles
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Hughes, Frank J.; Edina, MN
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| Assignee: |
Vision-Ease Lens, Inc., Brooklyn Center, MN
other patents from VISION-EASE LENS, INC. (730114) (approx. 29)
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| Published / Filed: |
1997-08-19
/ 1995-10-30
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| Application Number: |
US1995000550161
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| IPC Code: |
Advanced:
G02B 5/23;
Core:
G02B 5/22;
IPC-7:
G02B 5/23;
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| ECLA Code: |
G02B5/23;
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| U.S. Class: |
Current:
252/586;
Original:
252/586;
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| Field of Search: |
252/586
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| Priority Number: |
| 1995-10-30 |
US1995000550161 |
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| Abstract: |
A photochromic article comprising a host material and a photochromic amount of a photochromic compound or a structural isomer of the photochromic compound, the photochromic compound represented by the formula: [Figure] wherein R1, R2, R4, R5, R6, R8, A, B, C, and D are each selected from the group consisting essentially of hydrogen, a stable organic radical, a heterocyclic group, halogen, a nitrogen-substituted radical, and a nitrogen-substituted ring radical.
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| Attorney, Agent or Firm: |
Kinney & Lange, P.A. ;
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| Primary / Asst. Examiners: |
Kelly, C. H.;
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| Maintenance Status: |
E3 Expired Check current status
CC Certificate of Correction issued
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 14 claims |
What is claimed is:
1. A photochromic article comprising a host material and a photochromic amount of a photochromic compound or a structural isomer of the photochromic compound, the photochromic compound represented by the formula: [Figure] wherein R1, R2, R4, R5, R6, and R8, are each selected from the group consisting essentially of hydrogen, alkyl, alkoxy, phenyl, naphthyl, cycloalkyl, furyl, alkoyl, alkoyloxy, aroyl, aroyloxy, halogen, amino, nitro, morpholino, piperidino, and piperazino; and
wherein A, B, C, and D are each selected from the group consisting essentially of alkyl, alkoxy, phenyl, naphthyl, cycloalkyl, furyl, alkoyl, alkoyloxy, aroyl, aroyloxy, hydrogen, an unsubstituted monovalent aromatic radical, a substituted monovalent aromatic radical, halogen, amino, nitro, morpholino, piperidino, and piperazino.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 20 U.S. patent(s) that reference this one
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| Foreign References: |
None
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| Other References: |
Besace, Yvon, Israel Marszak, and Jocelyne Maisse; Synthesis and Applications of Monoaryl Ethers of Butynediol; Bull. Soc. Chim. Fr. ; No. 6, pp. 2275-2279; (1971).
Cited by 2 patents
Dean, Francis M., Steven N. France and Ulku Oyman; Cation Radicals in the Bromination of Benzodipyran Derivatives; Tetrahedron; vol. 44, No. 15; pp. 4857-4862; (1988).
(6 pages)
Cited by 2 patents
Liska, Kenneth J.; Preparation and Antitumor Properties of Analogs of Acronycine; Journal of Medicinal Chemistry, vol. 15, No. 11; pp. 1177-1179; (1972).
Cited by 13 patents
Sadykov, T., K.B. Erzhanov, M.B. Basymbekov, and S.D. Praliev; Hydration of o-, m-, and p-bis (Propynyloxy) Benzenes and Their Glycols; Ivz. Akad. Nauk Kaz. SSR, Ser. Khim; No. 1; pp. 63-67; (1988).
Venugopalan, Bindumadhavan and Kalpattu Kuppuswamy Balasubramanian; Studies on Claisen Rearrangement of Bis-Propargyl Ethers--Synthesis of Naphthodipyrans, Naphthodifurans and Naphthofuropyrans; Heterocycles; vol. 23, No. 1; pp. 81-92; (1985).
(12 pages)
Cited by 2 patents
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