US2584148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of a catalyst from clay
Assignee: Houdry Process Corp
•
Filing: 1946-05-28
•
Granted: 1952-02-05
•
Expires: 1966-05-28
Abstract
No abstract record available.
Inventors
- 👤 Mills George Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:14
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
THE METHOD OF PRODUCING ACTIVE CONTACT MASSES FROM A KAOLIN CLAY WHICH COMPRISES SUBJECTING RAW KAOLIN TO TREATMENT WITH MINERAL ACID, FORMING THE KAOLIN INTO PELLETS, SUBJECTING THE PELLETS TO CALCINATION AT A TEMPERATURE ABOVE 500* F., TREATING THE CALCINED PELLETS WITH DILUTE SODIUM HYDROXIDE SOLUTION, WASHING AND DRYING THE TREATED PELLETS AND THEREAFTER CONTACTING THE PELLETS WITH AN ALUMINUM SALT SOLUTION.
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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) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |