US3660280A
Expired / Lapsed
US
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Dialysis apparatus
Assignee: Calmic Engineering Co Ltd
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Filing: 1969-04-23
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Granted: 1972-05-02
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Expires: 1989-04-23
Abstract
Abstract A DIALYSIS SYSTEM FOR REMOVING TOXIC SUBSTANCES FROM THE BLOOD, PROVIDED WITH A DIALYSIS MEMBRANE IN THE FORM OF A SEMI-PERMEABLE FLAT MEMBER AND A FLAT ENVELOPE WITHIN WHICH THE FLAT MEMBER IS SITUATED, AND INCLUDING A FLEXIBLE LATTICE. D R A W I N G
Inventors
- 👤 George A Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:19
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/10; B01D61/00; B01D61/24; B01D61/28; B01D2313/00; B01D2313/08; B01D2313/086
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |