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Patent US2870309A successfully refreshed from Google Patents.
US2870309A
Expired / Lapsed
US
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Zone purification device
Assignee: Individual
•
Filing: 1957-06-11
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Granted: 1959-01-20
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Expires: 1977-06-11
Abstract
No abstract record available.
Inventors
- 👤 Emil R Capita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:23
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/28; C30B13/16; C30B13/20; C30B13/32; Y; Y10; Y10S; Y10S65/00; Y10S65/04; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1076; Y10T117/1084
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |