Patent US2589189A successfully refreshed from Google Patents.
US2589189A
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Silica-alumina-group vill metal catalyst
Assignee: Atlantic Richfield Co
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Filing: 1949-08-17
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Granted: 1952-03-11
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Expires: 1969-08-17
Abstract
No abstract record available.
Inventors
- 👤 Frank G Ciapetta
- 👤 William H Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:58
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/24; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J23/70; B01J37/00; B01J37/02; B01J37/0201; B01J37/03; C07C2521/00; C07C2521/12; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/42; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/755
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A CATALYST COMPOSITION CONSISTING ESSENTIALLY OF A SYNTHETIC SILICA ALUMINA AGENT RANGING BETWEEN 80%-95% SILICA GEL AND 5%-20% OF ALUMINA, IMPREGNATED WITH 0.1%-10% BY WEIGHT OF A METAL OF GROUP VIII OF THE PERIODIC SYSTEM.
Claim 2
Dependent Claim
35 words
A CATALYST COMPOSITION CONSISTING ESSENTIALLY OF A SYNTHETIC SILICA ALUMINA AGENT RANGING BETWEEN 80%-95% SILICA GEL AND 5%-20% OF ALUMINA, IMPREGNATED WITH 0.1%-10% BY WEIGHT OF A METAL OF GROUP VIII OF THE PERIODIC SYSTEM.
References Cited (Backward Citations)
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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) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |