US2391160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining operation
Assignee: Standard Oil Development Co
•
Filing: 1942-05-02
•
Granted: 1945-12-18
•
Expires: 1962-05-02
Abstract
No abstract record available.
Inventors
- 👤 Charles A Hillman
- 👤 Donald L Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:28
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/16; C07C11/167; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; C07C9/00; C07C9/14; C07C9/16
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) | 1948-12-17 | 1949-06-18 | 1949-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-12-17 | 1953-06-18 | 1953-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-12-17 | 1957-06-18 | 1957-12-18 | $7700.00 | Window Closed / Lapsed |