US2536768A
Expired / Lapsed
US
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Preparation of tungsten oxide catalyst
Assignee: Imperial Chemical Industries Ltd
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Filing: 1947-07-22
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Granted: 1951-01-02
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Expires: 1967-07-22
Abstract
No abstract record available.
Inventors
- 👤 Reynolds Peter William
- 👤 Grudgings Donald Malcolmson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:26
CPC Classifications
C; C07; C07B; C07B35/00; C07B35/06; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/30; C07C; C07C29/00; C07C29/03; C07C29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PRODUCTION OF CATALYSTS FOR USE IN THE PREPARATION OF MONOHYDRIC ALIPHATIC ALCOHOLS BY HYDRATION OF OLEFINS WITH WATER AT ELEVATED TEMPERATURES, WHICH COMPRISES PELLETING A POWDERED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF TUNGSTIC ACID AND AMMONIUM PARATUNGSTATE AT HIGH PRESSURE, AND SUBSEQUENTLY REDUCING SAID SUBSTANCE TO FORM BLUE OXIDE OF TUNGSTEN BY HEATING THE RESULTING PELLETS AT A TEMPERATURE WITHIN THE RANGE OF FROM 220* TO 350* C. IN THE PRESENCE OF A REDUCING AGENT WHICH IS GASEOUS UNDER NORMAL ATMOSPHERIC PRESSURES AT SAID TEMPERATURE.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE PRODUCTION OF CATALYSTS FOR USE IN THE PREPARATION OF MONOHYDRIC ALIPHATIC ALCOHOLS BY HYDRATION OF OLEFINS WITH WATER AT ELEVATED TEMPERATURES, WHICH COMPRISES PELLETING A POWDERED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF TUNGSTIC ACID AND AMMONIUM PARATUNGSTATE AT HIGH PRESSURE, AND SUBSEQUENTLY REDUCING SAID SUBSTANCE TO FORM BLUE OXIDE OF TUNGSTEN BY HEATING THE RESULTING PELLETS AT A TEMPERATURE WITHIN THE RANGE OF FROM 220* TO 350* C. IN THE PRESENCE OF A REDUCING AGENT WHICH IS GASEOUS UNDER NORMAL ATMOSPHERIC PRESSURES AT SAID TEMPERATURE.
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) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |