US2491115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for solvent extraction
Assignee: Individual
•
Filing: 1943-11-27
•
Granted: 1949-12-13
•
Expires: 1963-11-27
Abstract
No abstract record available.
Inventors
- 👤 Charles R Kincaide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:23
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/10; C11B1/102; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0226; B01D11/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1194015A
Cited
US1748356A
Cited
US2158427A
Cited
US2278647A
Cited
US2227605A
Cited
US2390388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |