Patent US3901829A successfully refreshed from Google Patents.
US3901829A
Expired / Lapsed
US
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Method of making radiographically opaque plastic tubing
Assignee: Sunlite Plastics Inc
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Filing: 1973-07-19
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Granted: 1975-08-26
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Expires: 1993-07-19
Abstract
Abstract A method of making flexible radiographically opaque plastic tubing for use as an X-ray 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
- 👤 Eugene L Slingluff
- 👤 Eli Ostoich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:05
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0108; A61M25/0009; F; F16; F16L; F16L11/00; F16L11/04; F16L11/06; F16L11/12; G; G21; G21F; G21F1/00; G21F1/02; G21F1/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
24 words
A METHOD OF RENDERING A THERMOPLASTIC COMPOSITION RADIOGRAPHICALLY OPAQUE, COMPRISING THE STEP OF INCORPORATING WITH THE THERMOPLASTIC COMPOSITION A MATERIAL HAVING THE FOLLOWING FORMULA:
Claim 2
Independent Claim
24 words
A METHOD OF RENDERING A THERMOPLASTIC COMPOSITION RADIOGRAPHICALLY OPAQUE, COMPRISING THE STEP OF INCORPORATING WITH THE THERMOPLASTIC COMPOSITION A MATERIAL HAVING THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
22 words
The method of claim 1, wherein said material is incorporated in an amount of 15 to 40% by weight of said composition.
Claim 4
Dependent Claim
35 words
The method of claim 1, and including the step of mixing a plasticizer with said thermoplastic composition prior to incorporating said material, said plasticizer comprising from 5 to 100% by weight of said thermoplastic composition.
Claim 5
Independent Claim
23 words
A method of making radiographically opaque plastic tubing, comprising the steps of incorporating with a thermoplastic composition a compound having the following formula:
Claim 6
Independent Claim
23 words
A method of making radiographically opaque plastic tubing, comprising the steps of incorporating with a thermoplastic composition a compound having the following formula:
References Cited (Backward Citations)
US2247880A
Cited
US3361700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |