US3447286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Totally enclosed liquid permselective membrane
Assignee: General Electric Co
•
Filing: 1967-08-02
•
Granted: 1969-06-03
•
Expires: 1987-08-02
Abstract
No abstract record available.
Inventors
- 👤 Angelo Dounoucos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:51
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D61/00; B01D61/38; B01D63/00; B01D63/08; B01D63/081; B01D63/087; B01D2313/00; B01D2313/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3335545A
Cited
US3396510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |