US2367671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propane fractionation of heavy oils
Assignee: Standard Oil Co
•
Filing: 1941-11-13
•
Granted: 1945-01-23
•
Expires: 1961-11-13
Abstract
No abstract record available.
Inventors
- 👤 John T Dickinson
- 👤 Morfit Oliver
- 👤 Leo J Van Orden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:54
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003; Y; Y10; Y10S; Y10S203/00; Y10S203/19
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) | 1948-01-23 | 1948-07-24 | 1949-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-01-23 | 1952-07-24 | 1953-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-01-23 | 1956-07-24 | 1957-01-23 | $7700.00 | Window Closed / Lapsed |