US4233440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triazolyl-stilbenes
Assignee: Bayer AG
•
Filing: 1979-04-23
•
Granted: 1980-11-11
•
Expires: 1999-04-23
Abstract
Abstract The subject matter are triazolyl-stilbenes of the formula ##STR1## wherein R 1 represents an optionally substituted styryl, biphenylyl or naphthyl radical, R 2 represents hydrogen, halogen, or an alkyl or phenyl radical and R 3 represents nitrile, carboxyl or carboxylic acid ester, as well as their preparation and their use as optical brighteners.
Inventors
- 👤 Alfons Dorlars
- 👤 Otto Neuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:19
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/72; C07C243/00; C07D; C07D249/00; C07D249/02; C07D249/04; C07D249/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
39 words
A triazolyl-stilbene of the formula ##STR36## wherein R 2 is H or Cl, R 3 is p--CN, o--CN, p--COOCH 3 or p--COOC 2 H 5 , and X is H, Cl, COOCH 3 or COOC 2 H 5 .
Claim 2
Dependent Claim
39 words
A triazolyl-stilbene of the formula ##STR36## wherein R 2 is H or Cl, R 3 is p--CN, o--CN, p--COOCH 3 or p--COOC 2 H 5 , and X is H, Cl, COOCH 3 or COOC 2 H 5 .
Claim 3
Dependent Claim
11 words
A triazolyl stilbene according to claim 1 of the formula ##STR37##
Claim 4
Dependent Claim
11 words
A triazolyl stilbene according to claim 1 of the formula ##STR38##
Claim 5
Dependent Claim
11 words
A triazolyl stilbene according to claim 1 of the formula ##STR39##
Claim 6
Dependent Claim
11 words
A triazolyl stilbene according to claim 1 of the formula ##STR40##
Claim 7
Dependent Claim
11 words
A triazolyl stilbene according to claim 1 of the formula ##STR41##
Claim 8
Dependent Claim
10 words
A triazolyl-stilbene according to claim 1 of the formula ##STR42##
Claim 9
Dependent Claim
10 words
A triazolyl-stilbene according to claim 1 of the formula ##STR43##
Claim 10
Dependent Claim
10 words
A triazolyl-stilbene according to claim 1 of the formula ##STR44##
Claim 11
Dependent Claim
10 words
A triazolyl-stilbene according to claim 1 of the formula ##STR45##
Claim 12
Dependent Claim
10 words
A triazolyl-stilbene according to claim 1 of the formula ##STR46##
Claim 13
Dependent Claim
10 words
A triazolyl-stilbene according to claim 1 of the formula ##STR47##
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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |