US4639251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible collapsible container with liquid level indicating device
Assignee: KabiVitrum Inc
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Filing: 1985-06-28
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Granted: 1987-01-27
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Expires: 2005-06-28
Abstract
Abstract Apparatus for administering medical liquids comprising a combination of a calibrated flexible bag and a liquid level indicating device for increasing the accuracy of measuring the level of liquids within the bag. The liquid level indicating device consists of a pair of spaced-apart elongated rollers which form a slot into which the upper part of the bag can be inserted. The rollers rest on the outside of the bag at about the upper level of liquid within the bag.
Inventors
- 👤 W. Dean Kirkland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:46
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; A61J2200/00; A61J2200/70; A61J2200/76
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
Apparatus for administering medical liquids comprising the combination of a calibrated flexible collapsible container and a liquid level indicating device which is supported on the outside surface of the calibrated container at about the upper level of the liquid contained therein wherein said collapsible container contains a liquid and is substantially devoid of air and said liquid level indicating device comprises a pair of spaced-apart, parallel elongated members which define a narrow rectangular slot, said slot being sized so that when a collapsed portion of the container is inserted therein opposing surfaces of said container are urged into abutting relationship with each other at about the level of the upper surface of liquid within the container.
Claim 2
Dependent Claim
116 words
Apparatus for administering medical liquids comprising the combination of a calibrated flexible collapsible container and a liquid level indicating device which is supported on the outside surface of the calibrated container at about the upper level of the liquid contained therein wherein said collapsible container contains a liquid and is substantially devoid of air and said liquid level indicating device comprises a pair of spaced-apart, parallel elongated members which define a narrow rectangular slot, said slot being sized so that when a collapsed portion of the container is inserted therein opposing surfaces of said container are urged into abutting relationship with each other at about the level of the upper surface of liquid within the container.
Claim 3
Dependent Claim
12 words
Apparatus according to claim 1 wherein the elongated members comprise hollow tubing.
Claim 4
Dependent Claim
16 words
Apparatus according to claim 1 wherein the elongated members are cylindrical and rotatable about their axes.
Claim 5
Dependent Claim
46 words
Apparatus according to claim 1 wherein the liquid level indicating device comprises a pair of cylindrical elongated members, each having a diameter from about 1/4 inch to about 1/2 inch and are spaced apart at their maximum span from about 1/8 inch to about 3/8 inch.
Claim 6
Dependent Claim
33 words
Apparatus according to claim 1 wherein said collapsible container comprises two opposing sheets of flexible plastic having their abutting edges sealed together to form an enclosed volume for retaining liquid to be administered.
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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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |