US3566874A
Expired / Lapsed
US
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Catheter
Assignee: National Patent Development Corp
•
Filing: 1968-08-13
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Granted: 1971-03-02
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Expires: 1988-08-13
Abstract
Abstract Catheters are provided with coating of a hydrophilic acrylate or methacrylate polymer. The coating reduces the irritation and infection normally accompanying the use of catheters. Infection can be reduced still further by absorbing an antibiotic in the coating.
Inventors
- 👤 Thomas H Shepherd
- 👤 Francis E Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
F; F02; F02M; F02M15/00; F02M15/02; F02M15/027; A; A61; A61L; A61L29/00; A61L29/08; A61L29/085; A61L29/14; A61L29/16; A61M; A61M25/00; A61M25/0009; A61M25/0017; A61M25/0043; A61M25/0045; A61M25/10; A61M25/1027; A61L2300/00; A61L2300/40; A61L2300/404; A61L2300/406; A61M2025/0056; A61M25/1029; A61M2025/1031
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
49 words
A flexible ureteral, urethral or cannular infection preventing tubular catheter made of natural or synthetic rubber or other flexible polymer having an adherent, solid external coating of a polymeric compound of the group consisting of hydrophilic acrylate and methacrylate polymers, said coating by itself being effective in preventing infections.
Claim 2
Dependent Claim
49 words
A flexible ureteral, urethral or cannular infection preventing tubular catheter made of natural or synthetic rubber or other flexible polymer having an adherent, solid external coating of a polymeric compound of the group consisting of hydrophilic acrylate and methacrylate polymers, said coating by itself being effective in preventing infections.
Claim 3
Dependent Claim
25 words
A catheter according to claim 1 wherein the infection preventing polymer is further impregnated with a member of the group consisting of antibiotics and germIcides.
Claim 4
Dependent Claim
39 words
A catheter according to claim 1 wherein the polymeric compound is selected from the group consisting of polymers of hydroxy lower alkyl acrylates, hydroxy lower alkyl methacrylates, hydroxy lower alkoxy loweralkyl acrylates, and hydroxy lower alkoxy lower alkyl methacrylates.
Claim 5
Dependent Claim
30 words
A catheter according to claim 3 wherein the hydrophilic polymer is a copolymer of said acrylate or methacrylate with a minor amount up to 20 percent of a cross-linking monomer.
Claim 6
Dependent Claim
7 words
A ureteral catheter according to claim 4.
Claim 7
Dependent Claim
7 words
A cannulae catheter according to claim 4.
Claim 8
Dependent Claim
32 words
A ureteral catheter according to claim 4 wherein the polymeric compound is 2-hydroxyethyl methacrylate and the cross-linking agent is a polyethylenically unsaturated monomer present in an amount of 0.1 to 2.5 percent.
Claim 9
Dependent Claim
10 words
A ureteral catheter according to claim 7 made of rubber.
Claim 10
Dependent Claim
15 words
A ureteral catheter according to claim 8 wherein the polymer is impregnated with an antibiotic.
Claim 11
Dependent Claim
33 words
A process of reducing the danger of infection normally present when using a catheter in a human comprising inserting into an appropriate organ of the human body a catheter according to claim 1.
Claim 12
Dependent Claim
11 words
A catheter according to claim 1 wherein the coating is dry.
Claim 13
Dependent Claim
33 words
A catheter according to claim 4 wherein there is uncross-linked hydrophilic polymer coating of said acrylate or methacrylate over said copolymer coating, said copolymer serving to adhere the uncross-linked polymer to the catheter.
References Cited (Backward Citations)
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Cited
US2237218A
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US2285980A
Cited
US2822809A
Cited
US2976576A
Cited
US3220960A
Cited
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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) | 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 |