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US2585473A
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Extraction apparatus and method
Assignee: VERA ALWARD KENNEDY
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Filing: 1947-05-03
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Granted: 1952-02-12
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Expires: 1967-05-03
Abstract
No abstract record available.
Inventors
- 👤 Angus B Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:23
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0234; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |