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US2256969A
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Method for control of temperature in catalytic exothermic reactions
Assignee: Standard Oil Development Co
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Filing: 1940-06-12
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Granted: 1941-09-23
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Expires: 1960-06-12
Abstract
No abstract record available.
Inventors
- 👤 Frank T Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:36
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0455; C07C1/048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-09-22 | 1945-03-24 | 1945-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-22 | 1949-03-24 | 1949-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-22 | 1953-03-24 | 1953-09-23 | $7700.00 | Window Closed / Lapsed |