US3854907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vented filter holder
Assignee: EMD Millipore Corp
•
Filing: 1973-12-10
•
Granted: 1974-12-17
•
Expires: 1993-12-10
Abstract
Abstract An improved vented microporous membrane filter holder is described which is particularly useful as a final filter in intravenous therapy. The holder includes two parts, a filter support member and a cover member, both substantially tubular in shape. The support member includes a hollow tubular member having grooves formed in its outer surface. A wettable filter is sealed to this outer surface. A closed passage connects to all of the grooves and carries filtered liquid to an outlet port formed in the base which seals one end of the hollow tubular member. The other end of the tubular member is closed with a non-wetting filter. Gas passed by this filter, after passing through the center of the tubular support member, is vented out an opening also formed in the base. A cover is sealed to the base at one end and a inlet port is formed in the other end of the cover, which surrounds the tubular support member.
Inventors
- 👤 D Rising
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:14
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0031; A; A61; A61M; A61M5/00; A61M5/14; A61M5/165; B01D61/00; B01D61/14; B01D61/18; B01D63/00; B01D63/06; B01D63/069; A61M2005/1657; A61M2205/00; A61M2205/75; A61M2205/7527; A61M2205/7536; A61M5/36; A61M5/38; A61M5/385; B01D2313/00; B01D2313/16
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
7 words
A VENTED FILTER HOLDER COMPRISING, IN COMBINATION:
Claim 2
Dependent Claim
7 words
A VENTED FILTER HOLDER COMPRISING, IN COMBINATION:
Claim 3
Dependent Claim
25 words
A HOLLOW TUBULAR SUPPORT MEMBER HAVING MEANS FORMING A FILTER INDERDRAIN SUPPORT ON ITS SURFACE, SAID SUPPORT MEMBER INCLUDING AN OPENING TO THE INTERIOR THEREOF;
Claim 4
Dependent Claim
25 words
A HOLLOW TUBULAR SUPPORT MEMBER HAVING MEANS FORMING A FILTER INDERDRAIN SUPPORT ON ITS SURFACE, SAID SUPPORT MEMBER INCLUDING AN OPENING TO THE INTERIOR THEREOF;
Claim 5
Dependent Claim
21 words
A SHEET OF LIQUID-WETTABLE FILTER MATERIAL SUPPORTED ON THE UNDERDRAIN SUPPORT FORMED ON THE OUTER SURFACE OF SAID TUBULAR SUPPORT MEMBER,
Claim 6
Dependent Claim
21 words
A SHEET OF LIQUID-WETTABLE FILTER MATERIAL SUPPORTED ON THE UNDERDRAIN SUPPORT FORMED ON THE OUTER SURFACE OF SAID TUBULAR SUPPORT MEMBER,
Claim 7
Dependent Claim
28 words
The combination defined in claim 1 in which said underdrain support is formed by a plurality of circumferentially extending grooves formed in the surface of said tubular member.
Claim 8
Dependent Claim
21 words
a sheet of liquid-wettable filter material supported on the underdrain support formed on the outer surface of said tubular support member;
Claim 9
Dependent Claim
21 words
a sheet of liquid-wettable filter material supported on the underdrain support formed on the outer surface of said tubular support member;
Claim 10
Dependent Claim
32 words
a microporous membrane filter sheet of liquid-wettable material supported on the underdrain support formed by said grooves on the outer surface of said tubular support member and sealed to said support member;
Claim 11
Dependent Claim
32 words
a microporous membrane filter sheet of liquid-wettable material supported on the underdrain support formed by said grooves on the outer surface of said tubular support member and sealed to said support member;
Claim 12
Dependent Claim
25 words
means providing a closed liquid passage joining said grooves and leading from said grooves to the outlet port through the interior of said tubular member.
Claim 13
Dependent Claim
25 words
means providing a closed liquid passage joining said grooves and leading from said grooves to the outlet port through the interior of said tubular member.
Claim 14
Dependent Claim
6 words
means forming a liquid outlet port;
Claim 15
Dependent Claim
6 words
means forming a liquid outlet port;
Claim 16
Dependent Claim
26 words
The combination defined in claim 1 in which said opening to the interior of said tubular member is the open end of said hollow tubular member.
Claim 17
Dependent Claim
6 words
MEANS FORMING A LIQUID OUTLET PORT;
Claim 18
Dependent Claim
6 words
MEANS FORMING A LIQUID OUTLET PORT;
Claim 19
Dependent Claim
15 words
MEANS PROVIDING A FIRST CLOSED FLUID PATH FROM SAID UNDERDRAIN SUPPORT TO SAID OUTLET PORT;
Claim 20
Dependent Claim
15 words
MEANS PROVIDING A FIRST CLOSED FLUID PATH FROM SAID UNDERDRAIN SUPPORT TO SAID OUTLET PORT;
Claim 21
Dependent Claim
17 words
The combination defined in claim 1 in which said liquid wettable filter material is a microporous membrane.
Claim 22
Dependent Claim
15 words
means providing a first closed fluid path from said underdrain support to said outlet port;
Claim 23
Dependent Claim
15 words
means providing a first closed fluid path from said underdrain support to said outlet port;
Claim 24
Dependent Claim
15 words
a non-liquid wettable microporous material sealed across the open end of said tubular support member;
Claim 25
Dependent Claim
15 words
a non-liquid wettable microporous material sealed across the open end of said tubular support member;
Claim 26
Dependent Claim
28 words
means forming a passage for gases passed by said nonliquid wettable material through the interior of said support member to the gas outlet formed in said base; and
Claim 27
Dependent Claim
28 words
means forming a passage for gases passed by said nonliquid wettable material through the interior of said support member to the gas outlet formed in said base; and
Claim 28
Dependent Claim
17 words
a non-liquid wettable filter material sealed across the opening to the interior of said hollow support member;
Claim 29
Dependent Claim
17 words
a non-liquid wettable filter material sealed across the opening to the interior of said hollow support member;
Claim 30
Dependent Claim
18 words
The combination defined in claim 4 in which said microporous membrane is made of mixed esters of cellulose.
Claim 31
Dependent Claim
17 words
A NON-LIQUID WETTABLE FILTER MATERIAL SEALED ACROSS THE OPENING TO THE INTERIOR OF SAID HOLLOW SUPPORT MEMBER;
Claim 32
Dependent Claim
17 words
A NON-LIQUID WETTABLE FILTER MATERIAL SEALED ACROSS THE OPENING TO THE INTERIOR OF SAID HOLLOW SUPPORT MEMBER;
Claim 33
Dependent Claim
33 words
MEANS FORMING A FLUID PASSAGE FROM THE INTERIOR OF SAID SUPPORT MEMBER THROUGH SAID SUPPORT MEMBER TO THE EXTERIOR OF SAID FILTER HOLDER, SAID PASSAGE BEING SEPARATED FROM SAID FIRST CLOSED PASSAGE; AND
Claim 34
Dependent Claim
33 words
MEANS FORMING A FLUID PASSAGE FROM THE INTERIOR OF SAID SUPPORT MEMBER THROUGH SAID SUPPORT MEMBER TO THE EXTERIOR OF SAID FILTER HOLDER, SAID PASSAGE BEING SEPARATED FROM SAID FIRST CLOSED PASSAGE; AND
Claim 35
Dependent Claim
18 words
The combination defined in claim 1 in which said non-liquid wettable filter material is a microporous membrane filter.
Claim 36
Dependent Claim
33 words
means forming a fluid passage from the interior of said support member through said support member to the exterior of said filter holder, said passage being separated from said first closed passage; and
Claim 37
Dependent Claim
33 words
means forming a fluid passage from the interior of said support member through said support member to the exterior of said filter holder, said passage being separated from said first closed passage; and
Claim 38
Dependent Claim
28 words
cover means, including means forming an inlet port surrounding said support member and filters and sealed to said support member base along a line but otherwise spaced therefrom.
Claim 39
Dependent Claim
28 words
cover means, including means forming an inlet port surrounding said support member and filters and sealed to said support member base along a line but otherwise spaced therefrom.
Claim 40
Dependent Claim
27 words
cover means, including means forming an inlet port surrounding said support member and filter and sealed to said support member along a line but otherwise spaced therefrom.
Claim 41
Dependent Claim
27 words
cover means, including means forming an inlet port surrounding said support member and filter and sealed to said support member along a line but otherwise spaced therefrom.
Claim 42
Dependent Claim
16 words
The combination defined in claim 6 in which said microporous membrane filter is made of polYtetrafluoroethylene.
Claim 43
Dependent Claim
27 words
COVER MEANS, INCLUDING MEANS FORMING AN INLET PORT SURROUNDING SAID SUPPORT MEMBER AND FILTER AND SEALED TO SAID SUPPORT MEMBER ALONG A LINE BUT OTHERWISE SPACE THEREFROM.
Claim 44
Dependent Claim
27 words
COVER MEANS, INCLUDING MEANS FORMING AN INLET PORT SURROUNDING SAID SUPPORT MEMBER AND FILTER AND SEALED TO SAID SUPPORT MEMBER ALONG A LINE BUT OTHERWISE SPACE THEREFROM.
Claim 45
Dependent Claim
13 words
The combination defined in claim 1 in which said cover means is transparent.
Claim 46
Dependent Claim
7 words
A vented filter holder comprising, in combination:
Claim 47
Dependent Claim
7 words
A vented filter holder comprising, in combination:
Claim 48
Dependent Claim
20 words
The combination defined in claim 9 in which said wettable microporous membrane material is made from mixed esters of cellulose.
Claim 49
Dependent Claim
17 words
The combination defined in claim 9 in which said non-wettable microporous membrane material is made from polytetrafluoroethylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |