US2376139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process
Assignee: Standard Oil Development Co
•
Filing: 1941-04-26
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Granted: 1945-05-15
•
Expires: 1961-04-26
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hemminger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:56
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/002; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; Y; Y02; Y02P; Y02P30/00; Y02P30/40
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) | 1948-05-14 | 1948-11-13 | 1949-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-05-14 | 1952-11-13 | 1953-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-05-14 | 1956-11-13 | 1957-05-15 | $7700.00 | Window Closed / Lapsed |