Patent US2104200A successfully refreshed from Google Patents.
Patent US4835003A successfully refreshed from Google Patents.
US4835003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical tubing with water-activated lubricating coating
Assignee: Baxter International Inc
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Filing: 1985-04-17
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Granted: 1989-05-30
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Expires: 2005-04-17
Abstract
Abstract Medical tubing carries on at least a portion of its length a water-activated lubricating coating of a hydrophilic thermoplastic resin which is adhesively compatible with the material of the medical tubing and polyvinyl pyrrolidone having a molecular weight of at least 200,000, in the form of a dispersed separate phase in the thermoplastic resin upon hydration. The polyvinyl pyrrolidone provides long-lasting lubrication when wet.
Inventors
- 👤 Lawrence F. Becker
- 👤 Dean G. Laurin
- 👤 Joseph A. Palomo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:18
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/08; A61L29/085; C; C09; C09D; C09D175/00; C09D175/04; C09D175/08; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/1393; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31573
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
The method of coating at least a portion of medical tubing with a mixture which comprises 1.5 to 10 parts by weight of a hydrophilic polyurethane resin solution in 100 parts by weight of a volatile solvent containing 1.5 to 10 weight percent of said resin, from 0.1 to 20 parts by weight of polyvinyl pyrrolidone having a molecular weight of at least 200,000, and 10 to 50 parts by weight of an alcohol having 1 to 3 carbon atoms; and thereafter allowing the coated medical tubing to dry, whereby a water-activated lubricating coating is provided to said medical tubing.
Claim 2
Independent Claim
100 words
The method of coating at least a portion of medical tubing with a mixture which comprises 1.5 to 10 parts by weight of a hydrophilic polyurethane resin solution in 100 parts by weight of a volatile solvent containing 1.5 to 10 weight percent of said resin, from 0.1 to 20 parts by weight of polyvinyl pyrrolidone having a molecular weight of at least 200,000, and 10 to 50 parts by weight of an alcohol having 1 to 3 carbon atoms; and thereafter allowing the coated medical tubing to dry, whereby a water-activated lubricating coating is provided to said medical tubing.
Claim 3
Dependent Claim
18 words
The method of claim 1 in which from 5 to 10 parts of said polyvinyl pyrrolidone is present.
Claim 4
Dependent Claim
18 words
The method of claim 2 in which said polyvinyl pyrrolidone has a molecular weight of at least 800,000.
Claim 5
Dependent Claim
12 words
The method of claim 3 in which said alcohol is ethyl alcohol.
Claim 6
Dependent Claim
20 words
The method of claim 4 in which from 15 to 25 parts by weight of said ethyl alcohol are present.
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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |