US2433670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic reaction apparatus
Assignee: Standard Oil Co
•
Filing: 1941-11-01
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Granted: 1947-12-30
•
Expires: 1961-11-01
Abstract
No abstract record available.
Inventors
- 👤 Kropp Einar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:40
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/0207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US461303A
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US628534A
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US1682787A
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US1850398A
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US1895063A
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US2234169A
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US2079935A
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US2149300A
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US2279153A
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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) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |