US2570882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a sintered cobalt oxide pelleted catalyst
Assignee: EIDP Inc
•
Filing: 1948-03-27
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Granted: 1951-10-09
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Expires: 1968-03-27
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:28
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/75; B01J37/00; B01J37/0009; B01J37/0018; B01J37/02; B01J37/03; B01J37/031
Claims Analysis
Total Claims: 0
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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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |