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Patent US2578469A successfully refreshed from Google Patents.
US2578469A
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Differential pressure distilling apparatus and method
Assignee: Pure Oil Co
•
Filing: 1948-04-07
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Granted: 1951-12-11
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Expires: 1968-04-07
Abstract
No abstract record available.
Inventors
- 👤 Albert W Goldsbarry
- 👤 Max M Tomaszewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:38
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/32; B01D3/322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1242292A
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US1318657A
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GB264476A
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US1852205A
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US1799414A
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US1784262A
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US2197872A
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US2410401A
Cited
US2443970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |