US1657941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the refining and purifying of liquids
Assignee: Sharples Specialty Co
•
Filing: 1924-04-02
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Granted: 1928-01-31
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Expires: 1944-04-02
Abstract
No abstract record available.
Inventors
- 👤 Philip T Sharples
- 👤 Leo D Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:27
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/02; C; C10; C10M; C10M175/00; F; F16; F16N; F16N39/00; F16N39/005; Y; Y10; Y10S; Y10S494/00; Y10S494/901
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) | 1931-01-30 | 1931-08-01 | 1932-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-30 | 1935-08-01 | 1936-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-30 | 1939-08-01 | 1940-01-31 | $7700.00 | Window Closed / Lapsed |