US2563729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for control of boundary between electrolytic fluids
Assignee: Individual
•
Filing: 1945-02-03
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Granted: 1951-08-07
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Expires: 1965-02-03
Abstract
No abstract record available.
Inventors
- 👤 Lewis G Longsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:39
CPC Classifications
B; B01; B01D; B01D59/00; B01D59/38; B01D59/42; B01D59/40; G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/034; Y10T137/2496; Y10T137/2499; Y10T137/2509; Y10T137/7287; Y10T137/7306; Y10T137/794; Y10T137/7976; Y10T137/8593; Y10T137/86187; Y10T137/86903; Y10T137/877
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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |