US3644486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of oxacylation products and optionally hydroxylation products of condensed aromatic compounds
Assignee: Hoechst AG
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Filing: 1968-09-19
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Granted: 1972-02-22
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Expires: 1988-09-19
Abstract
Abstract CATALYLIC MANUFACTURE OF OXAYLATION PRODUCTS AND OPTIONALLY HYDROXYLATION PRODUCTS OF CONDENSED AROMATIC CMPOUNDS FROM CONDENSED AROMATIC COMPOUNDS AND SATURATED ALIPHATIC OR CYCLOALIPHATIC CARBOXYLIC ACIDS AND MOLECULAR OXYGEN IN THE PRESENCE OF A NOBLE METAL OF SUB-GROUP 8 OF THE MEDELEEFF PERIODIC TABLE OR COMPOUNDS THEREOF, THE STABLE VALENCY OF THIS NOBLE METAL IN SAID COMPOUNDS BEING AT MOST 4.
Inventors
- 👤 Manfred Boldt
- 👤 Hans-Jurgen Arpe
- 👤 Lothar Hornig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:47
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |