US3994834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triazolyl stilbene brighteners method of preparing and detergents therewith
Assignee: Bayer AG
•
Filing: 1973-10-05
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Granted: 1976-11-30
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Expires: 1993-10-05
Abstract
Abstract The stilbene compound of the formula ##SPC1## Exists in three crystal modifications. Two of them are valuable as brighteners for preparing colorless detergents. The stilbene compound is prepared from the corresponding sulphonic acids, their mono- or di-sodium salts.
Inventors
- 👤 Alfons Dorlars
- 👤 Heinrich Gold
- 👤 Walter Horstmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:38
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/40; C11D3/42; C07; C07D; C07D249/00; C07D249/02; C07D249/04; C07D249/06; C09; C09B; C09B23/00; C09B23/14; C09B23/141
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
27 words
The compound of the formula ##SPC3## in the β-modification, characterised by the following d-values in the X-ray spectrum: 20.20 A; 3.99 A; 3.69 A and 2.91 A.
Claim 2
Dependent Claim
27 words
The compound of the formula ##SPC3## in the β-modification, characterised by the following d-values in the X-ray spectrum: 20.20 A; 3.99 A; 3.69 A and 2.91 A.
Claim 3
Dependent Claim
7 words
Detergents brightened with compounds of claim 1.
Claim 4
Dependent Claim
28 words
The compound of the formula ##SPC4## in the γ -modification, characterized by the following d-values in the X-ray spectrum; 19.97 A; 6.45 A; 4.89 A; and 3.60 A.
Claim 5
Dependent Claim
28 words
The compound of the formula ##SPC4## in the γ -modification, characterized by the following d-values in the X-ray spectrum; 19.97 A; 6.45 A; 4.89 A; and 3.60 A.
Claim 6
Dependent Claim
8 words
Detergent brightened with the compound of claim 3.
Claim 7
Dependent Claim
34 words
Process for the manufacture of the compound of the formula ##SPC5## characterised in that the disodium salt thereof is reacted in water at a temperature of 90°-120° C with potassium carbonate and/or potassium chloride.
Claim 8
Dependent Claim
34 words
Process for the manufacture of the compound of the formula ##SPC5## characterised in that the disodium salt thereof is reacted in water at a temperature of 90°-120° C with potassium carbonate and/or potassium chloride.
Claim 9
Dependent Claim
20 words
Process according to claim 5, characterised in that it is carried out under pressures of up to 10 atmospheres gauge.
Claim 10
Dependent Claim
21 words
Process according to claim 5, characterised in that the reaction is carried out in the presence of alcohols, ketones or esters.
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) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |