US2438728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control in fluidized catalyst systems
Assignee: Standard Oil Development Co
•
Filing: 1944-06-10
•
Granted: 1948-03-30
•
Expires: 1964-06-10
Abstract
No abstract record available.
Inventors
- 👤 Charles W Tyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:03
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1836; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/16; Y10S48/00; Y10S48/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2379027A
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US2341193A
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US2366372A
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US2367281A
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US2327175A
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US2387309A
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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) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |