US3598126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vascular canula for medical applications
Assignee: Baxter International Inc
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Filing: 1968-07-25
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Granted: 1971-08-10
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Expires: 1988-07-25
Abstract
Abstract A vascular canula which is intended for insertion into a blood vessel. The canula includes a thin-walled tube made of silicone rubber. The tubing wall is reinforced with thin fibers to provide a canula which combines softness and flexibility with stability of shape.
Inventors
- 👤 Josef Hoeltzenbein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:27
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0012; A61M25/0043; A61M25/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A vascular canula comprising a silicone rubber tube having a wall thickness of no more than about 0.2 mm., having a nonwoven, helical fiber disposition running in a single axial helical direction, embedded in said tube wall, and running substantially the length of the tube, the fiber material being selected from the group consisting of glass, quartz, silver, steel, and iron, whereby radial expansion of said tube under internal pressure is restricted without severe reduction of the axial extensibility of said tube.
Claim 2
Dependent Claim
82 words
A vascular canula comprising a silicone rubber tube having a wall thickness of no more than about 0.2 mm., having a nonwoven, helical fiber disposition running in a single axial helical direction, embedded in said tube wall, and running substantially the length of the tube, the fiber material being selected from the group consisting of glass, quartz, silver, steel, and iron, whereby radial expansion of said tube under internal pressure is restricted without severe reduction of the axial extensibility of said tube.
Claim 3
Dependent Claim
14 words
A vascular canula as defined in claim 1 wherein, the fiber material is glass.
Claim 4
Dependent Claim
33 words
A vascular canula as defined in claim 1 wherein, said fibers extend at least partially from said wall into the interior of said tube to make the interior of said tube noticeably rough.
Claim 5
Dependent Claim
26 words
A vascular canula as defined in claim 1 further including, a generally frustoconical, tapered portion of relatively reduced diameter positioned at one extremity of said tube.
Claim 6
Dependent Claim
12 words
The canula of claim 1 in which said fiber material is steel.
Claim 7
Dependent Claim
12 words
The canula of claim 1 in which said fiber material is quartz.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |