US2977324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1958-06-20
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Granted: 1961-03-28
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Expires: 1978-06-20
Abstract
No abstract record available.
Inventors
- 👤 Dowden Dennis Albert
- 👤 Caldwell Alexander Muirhea Ure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:20
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66; B01J23/68; B01J23/682; B01J23/16; B01J23/20; B01J23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR THE PRODUCTION OF AN OXIDATION CATALYST WHICH CONSISTS ESSENTIALLY OF (1) CONTACTING PARTICLES OF A POROUS, HIGH-MELTING, HEAT-RESISTANT CERAMIC MATERIAL WITH A MOLTEN CATALYTIC MATERIAL CONSISTING ESSENTIALLY OF A VANADYL VANADATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF THALLIUM, SILVER, POTASSIUM, SODIUM, LITHIUM AND RUBIDIUM, AND (2) THEREAFTER ALLOWING THE PRODUCT TO COOL, WHEREBY THERE IS OBTAINED A CATALYST CONSISTING ESSENTIALLY OF THE SAID CERAMIC MATERIAL IMPREGNATED WITH THE SAID SOLID VANADYL VANADATE.
Claim 2
Dependent Claim
78 words
A PROCESS FOR THE PRODUCTION OF AN OXIDATION CATALYST WHICH CONSISTS ESSENTIALLY OF (1) CONTACTING PARTICLES OF A POROUS, HIGH-MELTING, HEAT-RESISTANT CERAMIC MATERIAL WITH A MOLTEN CATALYTIC MATERIAL CONSISTING ESSENTIALLY OF A VANADYL VANADATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF THALLIUM, SILVER, POTASSIUM, SODIUM, LITHIUM AND RUBIDIUM, AND (2) THEREAFTER ALLOWING THE PRODUCT TO COOL, WHEREBY THERE IS OBTAINED A CATALYST CONSISTING ESSENTIALLY OF THE SAID CERAMIC MATERIAL IMPREGNATED WITH THE SAID SOLID VANADYL VANADATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |