Patent US3450631A successfully refreshed from Google Patents.
US3450631A
Expired / Lapsed
US
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Ion specific membranes
Assignee: Yeda Research and Development Co Ltd
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Filing: 1965-12-13
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Granted: 1969-06-17
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Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 Rene Bloch
- 👤 David Vofsi
- 👤 Ora Kedem
- 👤 Aharon Katchalsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:16
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/40; B; B01; B01D; B01D61/00; B01D61/24; B01D61/243; B01D61/38; B01D71/00; B01D71/06; B01D71/30; B01D71/301; B01D71/76; B01D71/82; C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/53
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) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |