US2428741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion of hydrocarbons
Assignee: ExxonMobil Oil Corp
•
Filing: 1944-11-29
•
Granted: 1947-10-07
•
Expires: 1964-11-29
Abstract
No abstract record available.
Inventors
- 👤 Charles J Plank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:20
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2154527A
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US2216262A
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US2317803A
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US2348599A
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US2336165A
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US2267767A
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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) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |