Patent US3617568A successfully refreshed from Google Patents.
Patent US3400074A successfully refreshed from Google Patents.
US3400074A
Expired / Lapsed
US
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Centrifugal reverse osmosis for desalination
Assignee: Individual
•
Filing: 1965-09-15
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Granted: 1968-09-03
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Expires: 1985-09-15
Abstract
No abstract record available.
Inventors
- 👤 Carl A Grenci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:36
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/16; B01D61/00; B01D61/02; B01D61/08; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/131
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2985587A
Cited
US3236768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |