Patent US2415973A successfully refreshed from Google Patents.
US2415973A
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Catalytic conversion system
Assignee: Standard Oil Co
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Filing: 1944-04-27
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Granted: 1947-02-18
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Expires: 1964-04-27
Abstract
No abstract record available.
Inventors
- 👤 John E Swearingen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:45
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/271; C07C5/2718; C07C5/2721
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2331429A
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US2314297A
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US2339685A
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US2349821A
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US2378733A
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US2366117A
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US2379550A
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US2378734A
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US2364583A
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US2366028A
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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) | 1950-02-17 | 1950-08-19 | 1951-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-17 | 1954-08-19 | 1955-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-17 | 1958-08-19 | 1959-02-18 | $7700.00 | Window Closed / Lapsed |