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Patent US2173986A successfully refreshed from Google Patents.
US2173986A
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Apparatus for increasing the solute content of solvents
Assignee: Occidental Chemical Corp
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Filing: 1937-05-28
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Granted: 1939-09-26
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Expires: 1957-05-28
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:38
CPC Classifications
B; B01; B01F; B01F21/00; B01F21/20; B01F35/00; B01F35/90; B01F35/91; B01F2035/99; Y; Y10; Y10S; Y10S422/00; Y10S422/902
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) | 1942-09-25 | 1943-03-27 | 1943-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-25 | 1947-03-27 | 1947-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-25 | 1951-03-27 | 1951-09-26 | $7700.00 | Window Closed / Lapsed |