US3256174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialysis cell with laminated gaskets
Assignee: AMF Inc
•
Filing: 1965-04-28
•
Granted: 1966-06-14
•
Expires: 1985-04-28
Abstract
No abstract record available.
Inventors
- 👤 Chen William Kwo-Wei
- 👤 Mintz Milton Sheldon
- 👤 Smith Richard Neilsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:31
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/08; B01D63/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A DIALYSIS CELL STACK COMPRISING LAYERS OF MEMBRANES AND GASKETS INTERSPERSED BETWEEN THE MEMBRANES, A LAMINATED FRAME GASKET COMPRISING, IN COMBINATION, A BASE HAVING A CUT OUT CENTRAL PORTION, FLUID FLOW APERTURES PASSING THROUGH THE PERIPHERY OF SAID BASE, AND GROOVES EXTENDING FROM THE CUT OUT CENTRAL PORTION TO AT LEAST TWO OF THE FLUID FLOW APERTURES, AND A COVER FIXED ON SAID BASE HAVING A CORRESPONDING CUT OUT PORTION AND CORRESPONDING FLUID FLOW APERTURES TO THOSE IN SAID BASE.
Claim 2
Dependent Claim
81 words
IN A DIALYSIS CELL STACK COMPRISING LAYERS OF MEMBRANES AND GASKETS INTERSPERSED BETWEEN THE MEMBRANES, A LAMINATED FRAME GASKET COMPRISING, IN COMBINATION, A BASE HAVING A CUT OUT CENTRAL PORTION, FLUID FLOW APERTURES PASSING THROUGH THE PERIPHERY OF SAID BASE, AND GROOVES EXTENDING FROM THE CUT OUT CENTRAL PORTION TO AT LEAST TWO OF THE FLUID FLOW APERTURES, AND A COVER FIXED ON SAID BASE HAVING A CORRESPONDING CUT OUT PORTION AND CORRESPONDING FLUID FLOW APERTURES TO THOSE IN SAID BASE.
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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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |