US2736752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of hexahydroxybenzene
Assignee: Evonik Operations GmbH
•
Filing: 1952-11-24
•
Granted: 1956-02-28
•
Expires: 1972-11-24
Abstract
No abstract record available.
Inventors
- 👤 Hoffmann Ullrich
- 👤 Schweitzer Otto
- 👤 Rinn Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:15
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/64; C07C37/01; C07C37/055
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN A PROCESS FOR THE PRODUCTION OF HEXA HYDROXYBENZENE BY REACTING AN ALKALI METAL AND CARBON MONOXIDE TO FORM AN ALKALI METAL CARBONYL AND HYDROLYZING SUCH CARBONYL THE STEP WHICH COMPRISES REACTING SODIUM WHITH CARBON MONOXIDE AT AN ELEVATED TEMPERATURE UP TO 380* C. AND AN ELEVATED PRESSURE UP TO 180 ATMOSPHERES TO FORM THE ALKALI METAL CARBONYL.
Claim 2
Dependent Claim
58 words
IN A PROCESS FOR THE PRODUCTION OF HEXA HYDROXYBENZENE BY REACTING AN ALKALI METAL AND CARBON MONOXIDE TO FORM AN ALKALI METAL CARBONYL AND HYDROLYZING SUCH CARBONYL THE STEP WHICH COMPRISES REACTING SODIUM WHITH CARBON MONOXIDE AT AN ELEVATED TEMPERATURE UP TO 380* C. AND AN ELEVATED PRESSURE UP TO 180 ATMOSPHERES TO FORM THE ALKALI METAL CARBONYL.
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) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |