Patent US4380643A successfully refreshed from Google Patents.
US4380643A
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Benzotriazole compound and homopolymer or copolymers thereof
Assignee: AGC Inc
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Filing: 1981-08-24
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Granted: 1983-04-19
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Expires: 2001-08-24
Abstract
Abstract A benzotriazole compound of the formula: <IMAGE> wherein A is hydrogen or acetyl; R2 is a C1-C4 alkyl group and n is 1 or 2.
Inventors
- 👤 Shohei Yoshida
- 👤 Otto Vogl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:48
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/32; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
A benzotriazole compound of the formula: ##STR11## wherein A is hydrogen or acetyl; R 2 is a C 1 -C 4 alkyl group and n is 1 or 2.
Claim 2
Dependent Claim
29 words
A benzotriazole compound of the formula: ##STR11## wherein A is hydrogen or acetyl; R 2 is a C 1 -C 4 alkyl group and n is 1 or 2.
Claim 3
Dependent Claim
11 words
The compound of claim 1, wherein said benzotriazole compound is 2(2-hydroxy-5-methyl-phenyl)2H-5-vinylbenzotriazole.
Claim 4
Dependent Claim
11 words
The compound of claim 1, wherein said benzotriazole compound is 2(2-acetoxy-5-methylphenyl)2H-5-vinylbenzotriazole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |