US2441827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction process
Assignee: Union Oil Company of California
•
Filing: 1943-10-27
•
Granted: 1948-05-18
•
Expires: 1963-10-27
Abstract
No abstract record available.
Inventors
- 👤 Mckinnis Art
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:58
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08; C07C7/10; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20; C10G7/00; C10G7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2023375A
Cited
GB413307A
Cited
GB441104A
Cited
US2053485A
Cited
US2159175A
Cited
US2143415A
Cited
US2162963A
Cited
US2290636A
Cited
US2325379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |