US3821240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-triazole compounds
Assignee: Sandoz AG
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Filing: 1971-12-28
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Granted: 1974-06-28
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Expires: 1991-12-28
Abstract
Abstract Bis-triazole compounds of formula WHERE A and B each stands for the atoms or groups of atoms necessary for the formation of dihydrated derivatives of aromatic carbocycles or heterocycles which may bear non-ionic substituents AND N HAS A VALUE FROM 1 TO 6, E.G., 1,4-BIS-(6''NAPHTHOTRIAZOLYL-(2'''')-BENZOXAZOLYL-2'')-BENZENE, WHICH ARE EMINENTLY SUITABLE AS OPTICAL BRIGHTENERS FOR ORGANIC MATERIALS ESPECIALLY PLASTICS, GIVING VERY FAST OPTICAL BRIGHTENINGS.
Inventors
- 👤 H Kittl
- 👤 H Schmid
- 👤 H Aebli
- 👤 F Fleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:23
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20; C07D249/22; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/34
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
8 words
A compound according to claim 1, in which
Claim 2
Dependent Claim
9 words
A compound according to claim 2 and of formula
Claim 3
Dependent Claim
11 words
The optical brightener according to claim 1 and of the formula
Claim 4
Dependent Claim
11 words
The optical brightener according to claim 1 and of the formula
Claim 5
Dependent Claim
11 words
The optical brightener according to claim 1 and of the formula
Claim 6
Dependent Claim
11 words
The optical brightener according to claim 1 and of the formula
Claim 7
Dependent Claim
11 words
The optical brightener according to claim 1 and of the formula
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |