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US4923450A
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Medical tubes for placement into the body of a patient
Assignee: KARO MAEDA
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Filing: 1988-06-30
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Granted: 1990-05-08
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Expires: 2008-06-30
Abstract
Abstract Medical tubes such as a catheter or cannula having antibacterial action against pseudomonas aeruginosa, staphylococcus aureus, escherichia coli and fungus is disclosed. Anhydrous or crystallization water containing powdered zeolite, wherein one or the whole of metals contained in said zeolite is substituted by at least one kind of ion exchangeable metals selected from the group consisting of Ag,Cu and Zn, is coated onto or kneaded into at least the portion of said tubes indwelled and placed into the body of a patient.
Inventors
- 👤 Karo Maeda
- 👤 Satoshi Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:35
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/14; A61L29/16; A61M; A61M25/00; A61M25/0017; A61L2300/00; A61L2300/10; A61L2300/102; A61L2300/104; A61L2300/40; A61L2300/404; A61L2300/80; A61L2300/802
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A medical tube for placement into a patient comprising metal containing powdered zeolite, wherein at least one of the metals contained in said zeolite is substituted by at least one ion exchangeable metal selected from the group consisting of Ag, Cu and Zn, having anti-bacterial properties, the zeolite being coated onto or kneaded into said medical tube wherein said medical tube, when in contact with said patient, continuously exhibits said antibacterial properties of said ion exchangeable metal for a period of time of at least two days.
Claim 2
Dependent Claim
87 words
A medical tube for placement into a patient comprising metal containing powdered zeolite, wherein at least one of the metals contained in said zeolite is substituted by at least one ion exchangeable metal selected from the group consisting of Ag, Cu and Zn, having anti-bacterial properties, the zeolite being coated onto or kneaded into said medical tube wherein said medical tube, when in contact with said patient, continuously exhibits said antibacterial properties of said ion exchangeable metal for a period of time of at least two days.
Claim 3
Dependent Claim
32 words
The medical tubes for placement into a patient according to claim 1, wherein said powdered zeolite is at least one member selected from the group consisting of natural zeolite and synthetic zeolite.
Claim 4
Dependent Claim
27 words
The medical tubes for placement into a patient according to claim 1, wherein said powdered zeolite is either coated onto at least one surface of the tube.
Claim 5
Dependent Claim
21 words
The medical tubes for placement into a patient according to claim 1, wherein said powdered zeolite is kneaded into said tubes.
Claim 6
Dependent Claim
19 words
The medical tubes for placement into a patient according to claim 1, wherein said medical tubes comprise a catheter.
Claim 7
Dependent Claim
19 words
The medical tubes for placement into a patient according to claim 1, wherein said medical tubes comprises a cannula.
Claim 8
Dependent Claim
35 words
The medical tubes for placement into a patient according to claim 1, wherein said powdered zeolite is anhydrous or a crystalline, hydrated zeolite having anti-bacterial action against Pseudomonas eruginosa, Staphylococcus aureus, Escherichia coli and fungus.
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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |