US4565779A
Expired / Lapsed
US
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Photochromic compounds and photosensitive compositions containing the compounds
Assignee: Sony Corp
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Filing: 1983-12-23
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Granted: 1986-01-21
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Expires: 2003-12-23
Abstract
Abstract Novel photochromic compounds are disclosed, which compounds are represented by the general formula <IMAGE> in which R1 represents an alkyl group having 1 to 20 carbon atoms, R2, R3, R4 and R5 independently represent an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, a halogen atom, a nitro group, a cyano group or a dimethylamino group, and R6, R7 and R8 independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or a halogen atom, and correspondingly 97 to 50 wt % of a film-forming polymer. Photosensitive compositions and materials comprising the compounds are also described.
Inventors
- 👤 Seiichi Arakawa
- 👤 Hirofumi Kondo
- 👤 Junetsu Seto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:33
CPC Classifications
C; C07; C07D; C07D495/00; C07D495/02; C07D495/10; C07C; C07C323/00; G; G03; G03C; G03C1/00; G03C1/685; Y; Y10; Y10S; Y10S430/00; Y10S430/163
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
A photosensitive composition comprising 3 to 50 wt. % of a photochromic compound of the general formula ##STR25## in which R 1 represents an alkyl group having 1 to 20 carbon atoms, R 2 , R 3 , R 4 and R 5 independently represent an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, a halogen atom, a nitro group, a cyano group or a dimethylamino group, and R 6 , R 7 and R 8 independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or a halogen atom, and correspondingly 97 to 50 wt. % of a film-forming polymer.
Claim 2
Dependent Claim
123 words
A photosensitive composition comprising 3 to 50 wt. % of a photochromic compound of the general formula ##STR25## in which R 1 represents an alkyl group having 1 to 20 carbon atoms, R 2 , R 3 , R 4 and R 5 independently represent an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, a halogen atom, a nitro group, a cyano group or a dimethylamino group, and R 6 , R 7 and R 8 independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or a halogen atom, and correspondingly 97 to 50 wt. % of a film-forming polymer.
Claim 3
Dependent Claim
34 words
A photosensitive composition according to claim 1, wherein R 1 represents an alkyl group having 1 to 10 carbon atoms, and R 2 and R 4 through R 8 independently represent a hydrogen atom.
Claim 4
Dependent Claim
16 words
A photosensitive composition according to claim 1 or 2, wherein said polymer is a chlorine-containing polymer.
Claim 5
Dependent Claim
16 words
A photosensitive material comprising a film of the composition as claimed in claim 1 or 2.
References Cited (Backward Citations)
US4237207A
Cited
US4485168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |