Patent US4283447A successfully refreshed from Google Patents.
US4283447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiopaque polyurethane resin compositions
Assignee: Becton Dickinson and Co
•
Filing: 1979-12-28
•
Granted: 1981-08-11
•
Expires: 1999-12-28
Abstract
Abstract Radiopaque compositions are provided by formulating polyurethane resins, alone, or combined with vinyl resins, with alkyl or alkoxyalkyl 2,5-diiodobenzoates, 2,3,4,6-tetraiodobenzoates or mixtures thereof. The compositions are useful in the manufacture of X-ray opaque medical devices, particularly medical surgical tubing. Surgical tubing with excellent plastic memory is provided, well adapted to forming flares and curved tips necessary for selective renal and celial arteriography. Multi-wall and co-tapered multiwall tubing constructions are also disclosed.
Inventors
- 👤 Vincent J. Flynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:30
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/04; A61L29/06; A61L29/049; A61L29/14; A61L29/18; A61M; A61M25/00; A61M25/0009; A61M25/0021; A61M25/0041; A61M25/0043; A61M25/0045; A61M25/01; A61M25/0105; A61M25/0108; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/336; C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08L; C08L75/00; C08L75/04; A61B; A61B90/00; A61B90/39; A61F; A61F2210/00; A61F2210/0014; A61F2210/0019; B29L; B29L2031/00; B29L2031/753; B29L2031/7542; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
Medical-surgical tubing comprising (a) a resin which includes from 100 to 33 parts by weight of a thermoplastic polyurethane and from 0 to 67 parts of a polymer of a halogenated vinyl monomer; and (b) a radiopacifier therfor consisting of a diiodobenzoate or a tetraiodobenzoate compound of the formula ##STR2## wherein R 1 is hydrogen or iodo, and R is alkyl or alkoxyalkyl and a mixture of said compounds, said radiopacifier (b) comprising 10 to 40 parts by weight per 100 parts by weight of (a) and (b).
Claim 2
Dependent Claim
88 words
Medical-surgical tubing comprising (a) a resin which includes from 100 to 33 parts by weight of a thermoplastic polyurethane and from 0 to 67 parts of a polymer of a halogenated vinyl monomer; and (b) a radiopacifier therfor consisting of a diiodobenzoate or a tetraiodobenzoate compound of the formula ##STR2## wherein R 1 is hydrogen or iodo, and R is alkyl or alkoxyalkyl and a mixture of said compounds, said radiopacifier (b) comprising 10 to 40 parts by weight per 100 parts by weight of (a) and (b).
Claim 3
Dependent Claim
23 words
Medical-surgical tubing as defined in claim 1 wherein in said radiopacifier, each R 1 is iodo and R is (lower)alkyl or (lower)alkoxy (lower)alkyl.
Claim 4
Dependent Claim
13 words
Medical-surgical tubing as defined in claim 1 wherein said radiopacifier is n-butyl 2,3,4,6-tetraiodobenzoate.
Claim 5
Dependent Claim
13 words
Medical-surgical tubing as defined in claim 1 wherein compound (b) is 2-ethoxyethyl 2,5-diiodobenzoate.
Claim 6
Dependent Claim
19 words
Medical-surgical tubing as defined in claim 1 wherein compound (b) is a mixture of n-butyl 2,3,4,6-tetraiodobenzoate and 2-ethoxyethyl 2,5-diiodobenzoate.
Claim 7
Dependent Claim
42 words
Medical-surgical tubing as defined in claim 1 which also includes as a partial replacement for radiopacifier (b) a compound selected from bismuth oxychloride or barium sulfate in an amount sufficient to enhance the radiopacity of said tubing while maintaining its tensile strength.
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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |