US2093770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical purification of liquids
Assignee: Individual
•
Filing: 1933-01-13
•
Granted: 1937-09-21
•
Expires: 1953-01-13
Abstract
No abstract record available.
Inventors
- 👤 Billiter Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:45
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/422; C; C02; C02F; C02F1/00; C02F1/46; C02F1/469; C02F1/4693; C02F1/4698; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/46115; C02F2209/00; C02F2209/02
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) | 1940-09-20 | 1941-03-22 | 1941-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-09-20 | 1945-03-22 | 1945-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-09-20 | 1949-03-22 | 1949-09-21 | $7700.00 | Window Closed / Lapsed |