US4682703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopper for medical container
Assignee: Terumo Corp
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Filing: 1986-04-24
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Granted: 1987-07-28
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Expires: 2006-04-24
Abstract
Abstract A stopper for a medical container which can tightly close an opening in said medical container and can be pierced with a syringe, which stopper is characterized by the fact that at least part of the portion thereof which possibly comes into contact with a piercing needle during the removal of said piercing needle therefrom is formed of a material containing a highly water absorbable macromolecular compound.
Inventors
- 👤 Masaaki Kasai
- 👤 Kenji Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:37
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01L3/50825; A; A61; A61B; A61B5/00; A61B5/15; A61B5/150007; A61B5/150015; A61B5/15003; A61B5/150351; A61B5/150374; A61B5/150381; A61B5/150473; A61B5/150496; A61B5/153; A61B5/154; A61B5/150389; A61B5/150534; A61B5/150572; A61B5/150732
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
A stopper for a medical container which can be pierced with a needle, which stopper is characterized by at least part of the portion of the stopper which comes into contact with a piercing needle during the removal of said piercing needle therefrom is formed of a material containing a highly water absorbable macromolecular compound.
Claim 2
Dependent Claim
55 words
A stopper for a medical container which can be pierced with a needle, which stopper is characterized by at least part of the portion of the stopper which comes into contact with a piercing needle during the removal of said piercing needle therefrom is formed of a material containing a highly water absorbable macromolecular compound.
Claim 3
Dependent Claim
49 words
A stopper according to claim 1, wherein said stopper is constructed so that said portion formed of said material containing a highly water absorbable macromolecular compound does not contact the contents of medical container when said stopper is placed into and tightly closes the opening of a medical container.
Claim 4
Dependent Claim
41 words
A stopper according to claim 1, wherein said material containing a highly water absorbable macromolecular compound is a synthetic resin type or natural or synthetic rubber type compound containing 2 to 30% by weight of said highly water absorbable macromolecular compound.
Claim 5
Dependent Claim
29 words
A stopper according to claim 3, wherein said highly water absorbable macromolecular compound can be swelled by absorbing water in an amount 50 to 10,000 times its own weight.
Claim 6
Dependent Claim
21 words
A stopper according to claim 4, wherein said highly water absorbable macromolecular compound is of a polyacrylamide type or polyacrylate type.
Claim 7
Dependent Claim
107 words
An evacuated blood collecting device comprising a cylindrical body having one end thereof closed and the other end opened and a stopper member puncturable by a piercing needle, said stopper member serving to close tightly the open end of the cylindrical body, wherein a space formed by said cylindrical body and said stopper member is maintained under reduced pressure, which said device is characterized in that at least part of a portion of said stopper member which comes into contact with said piercing needle during the removal of said piercing needle from the stopper member is formed of a material containing a highly water absorbable macromolecular compound.
Claim 8
Dependent Claim
107 words
An evacuated blood collecting device comprising a cylindrical body having one end thereof closed and the other end opened and a stopper member puncturable by a piercing needle, said stopper member serving to close tightly the open end of the cylindrical body, wherein a space formed by said cylindrical body and said stopper member is maintained under reduced pressure, which said device is characterized in that at least part of a portion of said stopper member which comes into contact with said piercing needle during the removal of said piercing needle from the stopper member is formed of a material containing a highly water absorbable macromolecular compound.
Claim 9
Dependent Claim
25 words
The evacuated blood collecting device of claim 6 wherein the stopper member has an outside diameter smaller than the outside diameter of the cylindrical body.
References Cited (Backward Citations)
US3136440A
Cited
US4444330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |