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Patent US1885393A successfully refreshed from Google Patents.
US1885393A
Expired / Lapsed
US
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Process of drying liquids by dialysis
Assignee: SCHAACK BROS CHEMICAL WORKS IN
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Filing: 1929-04-29
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Granted: 1932-11-01
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Expires: 1949-04-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert H Van Schaack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:56
CPC Classifications
F; F26; F26B; F26B5/00; B; B01; B01D; B01D71/00; B01D71/06; B01D71/74; B01D61/00; B01D61/24; B01D61/243; B01D61/244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-11-01 | 1936-05-02 | 1936-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-11-01 | 1940-05-02 | 1940-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-11-01 | 1944-05-02 | 1944-11-01 | $7700.00 | Window Closed / Lapsed |