US4778455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter
Assignee: Terumo Corp
•
Filing: 1987-12-23
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Granted: 1988-10-18
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Expires: 2007-12-23
Abstract
Abstract A nutritive catheter is assembled by attaching a head to the distal end of a main tubing having a duct therethrough, the head being formed from a composition comprising a flexible synthetic resin and a finely divided metal material in a ratio by volume of resin to metal material of at least 2 and having a specific gravity of at least 2. An opening is provided in the head in communication with the tubing duct.
Inventors
- 👤 Tadashi Kousai
- 👤 Yousuke Moriuchi
- 👤 Susumu Tanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:35
CPC Classifications
A; A61; A61J; A61J15/00; A61J15/0003; A61J15/0026; A61L; A61L29/00; A61L29/12; A61L29/126
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
108 words
A catheter comprising a main tubing having distal and proximal ends and a duct therethrough, a head attached to the distal end of the tubing, and an opening provided near the distal end of the catheter in communication with the duct of the main tubing, characterized in that said head is formed from a composition comprising a flexible synthetic resin in admixture with a finely divided metal material, with the blend ratio by volume of synthetic resin to metal material being at least 2, and has a specific gravity of at least 2, wherein said finely divided metal material has a particle size of up to 10 μm.
Claim 2
Dependent Claim
108 words
A catheter comprising a main tubing having distal and proximal ends and a duct therethrough, a head attached to the distal end of the tubing, and an opening provided near the distal end of the catheter in communication with the duct of the main tubing, characterized in that said head is formed from a composition comprising a flexible synthetic resin in admixture with a finely divided metal material, with the blend ratio by volume of synthetic resin to metal material being at least 2, and has a specific gravity of at least 2, wherein said finely divided metal material has a particle size of up to 10 μm.
Claim 3
Dependent Claim
16 words
The catheter of claim 1 wherein said head has a specific gravity of at least 3.
Claim 4
Dependent Claim
28 words
The catheter of claim 2 wherein said synthetic resin is selected from the group consisting of vinyl chloride resins, urethane resins, silicone resins, polyethylene, and vinyl acetate resins.
Claim 5
Dependent Claim
20 words
The catheter of claim 2 wherein said metal material is selected from a metal, a metal compound, and mixtures thereof.
Claim 6
Dependent Claim
26 words
The catheter of claim 2 wherein said metal material is at least one member selected from the group consisting of tungsten, tungsten dioxide, and tungsten carbide.
Claim 7
Dependent Claim
13 words
The catheter of claim 1 wherein said opening is formed in said head.
Claim 8
Dependent Claim
17 words
The catheter of claim 6 wherein said opening is formed in the free end of said head.
Claim 9
Dependent Claim
16 words
The catheter of claim 1 wherein said finely divided metal material is a powdery metal material.
Claim 10
Dependent Claim
20 words
The catheter of claim 1 wherein said finely divided metal material has a particle size of up to 10 μm.
Claim 11
Dependent Claim
20 words
The catheter of claim 9 wherein said finely divided metal material has a particle size of up to 5 μm.
Claim 12
Dependent Claim
28 words
The catheter of claim 1 wherein said synthetic resin is selected from the group consisting of vinyl chloride resins, urethane resins, silicone resins, polyethylene, and vinyl acetate resins.
Claim 13
Dependent Claim
20 words
The catheter of claim 1 wherein said metal material is selected from a metal, a metal compound, and mixtures thereof.
Claim 14
Dependent Claim
26 words
The catheter of claim 1 wherein said metal material is at least one member selected from the group consisting of tungsten, tungsten dioxide, and tungsten carbide.
Claim 15
Dependent Claim
54 words
The catheter of claim 1 wherein said head is a bullet-shaped body having a rounded leading edge and a trailing edge adjacent said distal end, said body having an axially extending bore, said bore being in fluid communication with said duct and extending to an intermediate portion of said body to form said opening.
Claim 16
Dependent Claim
36 words
The catheter of claim 14 wherein said axially extended bore comprises a first portion coaxial with the duct and a second portion essentially traversing said first portion at the distal end thereof to form said opening.
References Cited (Backward Citations)
US4182342A
Cited
GB2065480A
Cited
US4410320A
Cited
US4516970A
Cited
FR2533443A1
Cited
US4496347A
Cited
US4610673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |