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US2079950A
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Electrical water purifier
Assignee: BORDEN CLARKE H
•
Filing: 1936-08-19
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Granted: 1937-05-11
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Expires: 1956-08-19
Abstract
No abstract record available.
Inventors
- 👤 Frank G Negus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:25
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/46104; C02F1/02; C02F1/463; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4612; C02F2201/46125; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86187
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) | 1940-05-10 | 1940-11-09 | 1941-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-05-10 | 1944-11-09 | 1945-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-05-10 | 1948-11-09 | 1949-05-11 | $7700.00 | Window Closed / Lapsed |