Patent US3567028A successfully refreshed from Google Patents.
US3567028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Membrane envelope assembly
Assignee: Research Corp
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Filing: 1968-12-26
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Granted: 1971-03-02
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Expires: 1988-12-26
Abstract
Abstract A sterile, relatively inexpensive, disposable membrane envelope assembly is provided with the assembly consisting of a pair of spaced opposed extended surface membranes sealed together, a pair of porous reinforcing sheets at the obverse surfaces of the membranes adhesively secured to the membranes, and fluid inlet and outlet nipples mounted at opposite edges of the membranes to direct fluid flow between the opposed surface membranes. Membrane envelopes resulting from both total surface adherence of the reinforcing sheets to the membranes, and peripheral adherence of the reinforcing sheets to the membranes are disclosed.
Inventors
- 👤 Yukihiko Nose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:09
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/08; B01D2313/00; B01D2313/10; B01D2313/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
A sterile membrane envelope assembly comprising a pair of spaced opposed extended surface membranes, a pair of dialysateinsoluble reinforcing sheets having peripheral dimensions greater than said membranes, dialysate-soluble adhesive means securing said reinforcing sheets to the outer surfaces of said membranes and to each other in marginal zones outwardly of the peripheral margins of the membranes, and fluid inlet and outlet nipples mounted at opposite side edges of said membranes to direct fluid flow between the opposed faces of the membranes.
Claim 2
Dependent Claim
81 words
A sterile membrane envelope assembly comprising a pair of spaced opposed extended surface membranes, a pair of dialysateinsoluble reinforcing sheets having peripheral dimensions greater than said membranes, dialysate-soluble adhesive means securing said reinforcing sheets to the outer surfaces of said membranes and to each other in marginal zones outwardly of the peripheral margins of the membranes, and fluid inlet and outlet nipples mounted at opposite side edges of said membranes to direct fluid flow between the opposed faces of the membranes.
Claim 3
Dependent Claim
38 words
The invention defined in claim 1 wherein inlet and outlet nipples are sealed inwardly of the margins of the dialyzer assembly and the outer ends thereof are removed by piercing the assembly prior to use of the dialyzer.
Claim 4
Dependent Claim
31 words
The invention defined in claim 2 wherein the inlet and outlet nipples are each provided with a string, tape or semirigid access member extending beyond the outer margins of the assembly.
Claim 5
Dependent Claim
15 words
The invention defined in claim 1 provided with a gasket exterior to the sealed edges.
Claim 6
Dependent Claim
101 words
A sterile membrane envelope assembly comprising a pair of spaced opposed extended surface membranes adhesively sealed together at their edges, a pair of porous reinforcing sheets at the obverse surfaces of the membranes adhesively secured to the edges of the membranes, and fluid inlet and outlet nipple means mounted at opposite side edges of the membranes to direct fluid flow between the opposed faces of the membranes, wherein said inlet and outlet nipple means are located inwardly of the margins of the dialyzer assembly and the outer ends thereof are removed by piercing the assembly prior to use of the dialyzer.
Claim 7
Dependent Claim
101 words
A sterile membrane envelope assembly comprising a pair of spaced opposed extended surface membranes adhesively sealed together at their edges, a pair of porous reinforcing sheets at the obverse surfaces of the membranes adhesively secured to the edges of the membranes, and fluid inlet and outlet nipple means mounted at opposite side edges of the membranes to direct fluid flow between the opposed faces of the membranes, wherein said inlet and outlet nipple means are located inwardly of the margins of the dialyzer assembly and the outer ends thereof are removed by piercing the assembly prior to use of the dialyzer.
Claim 8
Dependent Claim
32 words
The invention defined in claim 5 wherein the inlet and outlet nipple means are each provided with a string, tape, or semirigid access member extending beyond the outer margins of the assembly.
Claim 9
Dependent Claim
15 words
The invention defined in claim 5 provided with a gasket exterior to the sealed edges.
References Cited (Backward Citations)
US3488690A
Cited
US3490523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |