US4127586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light protection agents
Assignee: BASF Corp
•
Filing: 1975-10-10
•
Granted: 1978-11-28
•
Expires: 1995-10-10
Abstract
Abstract New 2-(2'-hydroxyphenyl)-benzotriazoles are used for protecting light-sensitive organic materials. They are prepared by diazotization of a 2-nitroaniline, coupling of the resulting diazo compound with a phenol and reduction of the resulting 2-nitroazo compound.
Inventors
- 👤 Jean Rody
- 👤 Hansjorg Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:19
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/35; C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475; C09; C09K; C09K15/00; C09K15/04; C09K15/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
A compound of the formula ##STR14## in which (a) one of X 1 and X 2 denotes a secondary alkyl selected from the group consisting of isopropyl or secondary butyl, the other of X 1 and X 2 denotes secondary-butyl, tert. butyl, tert. amyl, tert. octyl, secondary-nonyl, tertiary. nonyl, 1-phenylethyl, cyclohexyl, or cyclooctyl (b) one of X 1 and X 2 denotes 1-phenylethyl, the other of X 1 and X 2 denotes methyl; and R 1 denotes hydrogen or chloro.
Claim 2
Dependent Claim
80 words
A compound of the formula ##STR14## in which (a) one of X 1 and X 2 denotes a secondary alkyl selected from the group consisting of isopropyl or secondary butyl, the other of X 1 and X 2 denotes secondary-butyl, tert. butyl, tert. amyl, tert. octyl, secondary-nonyl, tertiary. nonyl, 1-phenylethyl, cyclohexyl, or cyclooctyl (b) one of X 1 and X 2 denotes 1-phenylethyl, the other of X 1 and X 2 denotes methyl; and R 1 denotes hydrogen or chloro.
Claim 3
Dependent Claim
9 words
A compound according to claim 1 which is ##STR15##
Claim 4
Dependent Claim
9 words
A compound according to claim 1 which is ##STR16##
Claim 5
Dependent Claim
9 words
A compound according to claim 1 which is ##STR17##
Claim 6
Dependent Claim
9 words
A compound according to claim 1 which is ##STR18##
Claim 7
Dependent Claim
9 words
A compound according to claim 1 which is ##STR19##
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) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |