Patent US2447845A successfully refreshed from Google Patents.
US2447845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for solvent extraction
Assignee: DETROIT REX PRODUCTS Co
•
Filing: 1943-07-24
•
Granted: 1948-08-24
•
Expires: 1963-07-24
Abstract
No abstract record available.
Inventors
- 👤 Clarence F Dinley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:17
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/10; C11B1/102
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US550035A
Cited
US1081949A
Cited
US126300A
Cited
CH7757A
Cited
US930909A
Cited
US1235672A
Cited
US1812107A
Cited
US1762593A
Cited
US2107537A
Cited
US2183837A
Cited
US2187208A
Cited
US2264390A
Cited
US2377135A
Cited
US2377136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |