US3528890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation of saline water to recover fresh water
Assignee: Alcoa Corp
•
Filing: 1966-08-10
•
Granted: 1970-09-15
•
Expires: 1986-08-10
Abstract
No abstract record available.
Inventors
- 👤 Melvin Henry Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:37
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3739055A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |