US3438869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for conversion of sea water into fresh water
Assignee: MIGUEL A SAAVEDRA
•
Filing: 1967-01-13
•
Granted: 1969-04-15
•
Expires: 1987-01-13
Abstract
No abstract record available.
Inventors
- 👤 Miguel A Saavedra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:45
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; Y; Y10; Y10S; Y10S159/00; Y10S159/02; Y10S159/24; Y10S203/00; Y10S203/11; Y10S203/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2756029A
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US2863729A
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GB882715A
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US2879146A
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US3165452A
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US3298931A
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US3326778A
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US3338797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |