US2703274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction apparatus
Assignee: Vulcan Copper and Supply Co
•
Filing: 1950-06-01
•
Granted: 1955-03-01
•
Expires: 1970-06-01
Abstract
No abstract record available.
Inventors
- 👤 Robert C Giesse
- 👤 William R Ludka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:44
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/10; C11B1/102; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0234
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1628787A
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US2405105A
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US2585473A
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US2567474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |