Patent US3749134A successfully refreshed from Google Patents.
US3749134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiographically opaque plastic tubing
Assignee: Sunlite Plastics Inc
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Filing: 1972-02-02
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Granted: 1973-07-31
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Expires: 1992-02-02
Abstract
Abstract Flexible radiographically opaque plastic tubing for use as an Xray catheter. The tubing is transparent to visible light and is rendered X-ray opaque by the incorporation of a diol of tetrabromophthalic anhydride. The radiographically opaque properties enable the tubing to be used as a catheter whose position within the body cavity can be determined by X-ray observation.
Inventors
- 👤 E Slingluff
- 👤 E Ostoich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:27
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0108; F; F16; F16L; F16L11/00; F16L11/04; F16L11/06; F16L11/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
The tube of claim 1, wherein said material is present in an amount of 15 to 40 percent by weight of the composition.
Claim 2
Dependent Claim
17 words
The tube of claim 1, wherein said material is distributed throughout the entire wall of said tube.
Claim 3
Dependent Claim
30 words
The tube of claim 1, wherein said resin composition comprises a thermoplastic resin and a plasticizer, said plastizer comprising from 5 percent to 100 percent by weight of said resin.
Claim 4
Dependent Claim
31 words
A catheter whose position within a body cavity can be determined by X-ray observation which comprises a flexible thermoplastic tube having incorporated within the wall thereof a material being the formula:
Claim 5
Dependent Claim
28 words
The catheter of claim 5, in which the material is distributed through the entire wall of the tube, whereby the entire circumference of the tube is X-ray opaque.
Claim 6
Dependent Claim
19 words
The catheter of claim 5, in which the tube has a Shore A durometer hardness of 45 to 90.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |