US2234568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrocarbons
Assignee: WILLIAM E CURRIE
•
Filing: 1937-01-18
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Granted: 1941-03-11
•
Expires: 1957-01-18
Abstract
No abstract record available.
Inventors
- 👤 Linckh Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:05
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/0445; B; B01; B01J; B01J37/00; B01J37/08; B01J37/082; B01J37/086; C07C1/0405; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/28; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/75; C07C2523/755
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) | 1944-03-10 | 1944-09-09 | 1945-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-10 | 1948-09-09 | 1949-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-10 | 1952-09-09 | 1953-03-11 | $7700.00 | Window Closed / Lapsed |