Patent US2612621A successfully refreshed from Google Patents.
US4900314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapse-resistant tubing for medical use
Assignee: FBK INTERNATIONAL Corp A CORP OF
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Filing: 1988-02-01
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Granted: 1990-02-13
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Expires: 2008-02-01
Abstract
Abstract A collapse-resistant catheter adapted for medical usage includes a central tube having a smooth outer wall rather than a corrugated outer wall characteristic of prior art collapse-resistant catheters. The tube includes an integral, spiral-shaped outer tube which provides the collapse-resistant characteristic. The spiral tube also provides an additional lumen. The center tube is adapted to provide for a multilumen structure not possible with corrugated prior art structures. The resulting structure, single or multilumen, can be made sufficiently small for insertion into the human body.
Inventors
- 👤 John Quackenbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:34
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; A; A61; A61M; A61M25/00; A61M25/0043; A61M25/0054; A61M25/0021; A61M25/0023; A61M25/0026; A61M2025/004
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
50 words
A collapse-resistant catheter comprising a central tube, said tube having a second tube integral with its exterior surface, said second tube having a hollow spiral geometry of a configuration open at both ends and providing a collapse-resistant function by its geometry alone, said central and said second tube being coextruded.
Claim 2
Dependent Claim
50 words
A collapse-resistant catheter comprising a central tube, said tube having a second tube integral with its exterior surface, said second tube having a hollow spiral geometry of a configuration open at both ends and providing a collapse-resistant function by its geometry alone, said central and said second tube being coextruded.
Claim 3
Dependent Claim
23 words
A catheter in accordance with claim 1 wherein said central and second tubes have a ratio of diameters of about eight to one.
Claim 4
Dependent Claim
16 words
A catheter in accordance with claim 1 wherein said central tube includes a plurality of lumens.
Claim 5
Dependent Claim
27 words
A catheter in accordance with claim 2 wherein said central tube has a diameter of 0.125 inch and said spiral tube has a diameter of 0.008 inch.
Claim 6
Dependent Claim
18 words
A catheter in accordance with claim 1 wherein said second tube is hollow and has a circular shape.
Claim 7
Dependent Claim
18 words
A catheter in accordance with claim 1 wherein said second tube is hollow and has a semicircular shape.
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) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |