US3235481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spacer gasket
Assignee: AMF Inc
•
Filing: 1964-10-21
•
Granted: 1966-02-15
•
Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Bernardus Mulder Zwart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:35
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/50; B01D61/24; B01D61/28; B01D63/00; B01D63/08; B01D63/082; B01D63/0822
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A DIALYSIS CELL STACK COMPRISING LAYERS OF MEMBRANES, AND GASKETS INTERSPERSED BETWEEN THE MEMBRANES, A GASKET CONTAINING A LARGE CENTRAL OPENING, MANIFOLD PERTURES AT EACH END OF SAID GASKET, AND CHANNELS COMMUNICATING BETWEEN THE CENTRAL OPENING AND AT LEAST TWO OF THE MANIFOLD APERTURES, A FIRST SET OF CROSS MEMBERS DISPOSED TOWARD ONE SURFACE OF SAID GASKET, EXTENDING ACROSS THE CENTRAL OPENING, AND NARROWING AS SAID FIRST SET OF CROSS MEMBERS APPROACHES THE SURFACE OF SAID GASKET, AND A SECOND SET OF CROSS MEMBERS DISPOSED TO-
Claim 2
Dependent Claim
87 words
IN A DIALYSIS CELL STACK COMPRISING LAYERS OF MEMBRANES, AND GASKETS INTERSPERSED BETWEEN THE MEMBRANES, A GASKET CONTAINING A LARGE CENTRAL OPENING, MANIFOLD PERTURES AT EACH END OF SAID GASKET, AND CHANNELS COMMUNICATING BETWEEN THE CENTRAL OPENING AND AT LEAST TWO OF THE MANIFOLD APERTURES, A FIRST SET OF CROSS MEMBERS DISPOSED TOWARD ONE SURFACE OF SAID GASKET, EXTENDING ACROSS THE CENTRAL OPENING, AND NARROWING AS SAID FIRST SET OF CROSS MEMBERS APPROACHES THE SURFACE OF SAID GASKET, AND A SECOND SET OF CROSS MEMBERS DISPOSED TO-
References Cited (Backward Citations)
US2894894A
Cited
US2891900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |