US3642882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of nitroarylethermonocarboxylic acids and their esters
Assignee: Bayer AG
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Filing: 1968-07-22
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Granted: 1972-02-15
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Expires: 1988-07-22
Abstract
Abstract NITROARYL ETHER MONOCARBOXYLIC ACIDS AND THEIR ESTERS AND A PROCESS FOR PRODUCING THEM BY REACTING (A) (1) A DIALKALI METAL SALT OR A M- OR P-HYDROXY ARYL CARBOXYLIC ACID OR (2) MONOALKALI METAL SALT OF A M- OR P-HYDROXY ARYL CARBOXYLIC ACID ESTER WITH (B) AN AROMATIC MONOITRO-HALO-SUBSTITUTED COMPOUND WHEREIN THE HALOGEN ATOM OR ATOMS AND NITRO SUBSTITUENT ARE RING ATTACHED: AND EFFECTING THE REACTION AT AN ELEVATED TEMPERATURE UTILIZING MOLAR AMOUNTS OF THE REACTANTS AT 50-160*C. IN THE PRESENCE OF A STRONGLY POLAR ORGANIC SOLVENT.
Inventors
- 👤 Heinrich Gilch
- 👤 Gerhard Darsow
- 👤 Ludwig Bottenbruch
- 👤 Gunter Lorenz
- 👤 Hans Egon Kunzel
- 👤 Gunther Nischk
- 👤 Hermann Schnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:15
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/27; C07C205/35; C07C205/36; C07C205/38; A; A01; A01N; A01N37/00; A01N37/36; A01N37/38; A01N37/40
Claims Analysis
Total Claims: 0
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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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |