US3833940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bile duct endoprothesis
Assignee: Individual
•
Filing: 1972-10-16
•
Granted: 1974-09-10
•
Expires: 1992-10-16
Abstract
Abstract A bile duct endoprothesis having a metal or plastic cannula for introduction into the bile duct and having rounded or beveled ends to aid in insertion and a radially extending portion which serves as a means for attaching a drain hose to the cannula and also as a means for insuring against longitudinal displacement of the cannula after it has been positioned within the bile duct. The cannula has two discrete end sections which are detachable joined to a push on frictional type connector that enables easier implantation of the cannula within a bile duct.
Inventors
- 👤 W Hartenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:08
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A bile duct emdoprothesis for restoring the biliary flux into the duodenum, comprising a cannula of a size which can be introduced into the bile duct, said cannula being made of material suitqble for implantation in a bile duct and having rounded free ends and at least one radial extension for protection against longitudinal displacements, the cannula comprising two discrete end sections and a discrete push-on frictional type connector detachably connecting said end sections together.
Claim 2
Dependent Claim
75 words
A bile duct emdoprothesis for restoring the biliary flux into the duodenum, comprising a cannula of a size which can be introduced into the bile duct, said cannula being made of material suitqble for implantation in a bile duct and having rounded free ends and at least one radial extension for protection against longitudinal displacements, the cannula comprising two discrete end sections and a discrete push-on frictional type connector detachably connecting said end sections together.
Claim 3
Dependent Claim
21 words
A bile duct endoprothesis according to claim 1, characterized in that the cannula is beveled, at least at one free end.
Claim 4
Dependent Claim
35 words
A bile duct endoprothesis according to claim 1, characterized in that the cannula is shaped according to the normal curvature of the bile duct and is shaped so for at least part of its length.
Claim 5
Dependent Claim
23 words
A bile duct endoprothesis according to claim 1, characterized in that at least one of the end sections is formed to be flexible.
Claim 6
Dependent Claim
22 words
A bile duct endoprothesis according to claim 4, characterized in that the flexible end section is covered by a thin-walled plastic hose.
Claim 7
Dependent Claim
61 words
A bile duct endoprothesis according to claim 4 characterized in that the flexible end section comprises a tightly wound coil spring, said connector having a redUced diameter portion and one end of said flexible end section being disposed over said reduced diameter portion of said connector and a torroidal end ring carried by the opposite end of said flexible end section.
Claim 8
Dependent Claim
73 words
A bile duct endoprothesis according to claim 4 and in which each of the end sections comprises tightly wound coil springs each of which carries a torroidal end ring at one end, said connector comprising a short connecting piece having reduced diameter opposite end portions, said end section having ends opposite said end rings fitting over said end portions, said radial extension comprising said connecting piece having a radially extending drain attachment means.
Claim 9
Dependent Claim
32 words
A bile duct endoprothesis according to claim 1, characterized in that the radial extension is formed as a nipple having a perforation which is in communication with the interior of the cannula.
References Cited (Backward Citations)
DK115942A
Cited
US243396A
Cited
FR17717E
Cited
CA666090A
Cited
US2560915A
Cited
US2587910A
Cited
US3434869A
Cited
US3435824A
Cited
US3515124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |