Patent US3666758A successfully refreshed from Google Patents.
US3666758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of 2-aryl-v-triazoles
Assignee: Bayer AG
•
Filing: 1968-08-14
•
Granted: 1972-05-30
•
Expires: 1988-08-14
Abstract
Abstract 2-Aryl-v-triazoles are prepared by condensation of alphaoximino-aryl-hydrazones or their O-acyl compounds at temperatures of about 100* to 210* C. in urea. The compounds are useful as dyestuff intermediates and as optical brighteners.
Inventors
- 👤 Alfons Dorlars
- 👤 Otto Neuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:49
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/72; C07D; C07D249/00; C07D249/02; C07D249/04; C07D249/06; F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/102; F24H1/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
Process according to claim 1, characterized in that the reaction medium additionally contains a solvent for reactants.
Claim 2
Dependent Claim
14 words
Process according to claim 1, characterized in that the reaction medium additionally contains water.
References Cited (Backward Citations)
FR1376876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |