US3948273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endotracheal tube having a non-sticking inner surface
Assignee: Medical Engineering Corp
•
Filing: 1974-09-13
•
Granted: 1976-04-06
•
Expires: 1994-09-13
Abstract
Abstract An endotracheal or tracheostomy tube having a non-sticking inside surface for allowing for the free movement of a suction catheter through the tube. The non-sticking surface is in the form of a series of grooves separated by ridges having thin edges extending through the length of the tube for engaging the surface of the catheter.
Inventors
- 👤 David H. Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:48
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0463; A61M1/00; A61M1/71; A61M1/74; A61M1/741; A61M1/7411
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
61 words
A tracheostomy or endotracheal tube formed from a flexible rubber material and including a series of thin ridges on the inner surface of said tube for preventing sticking between said tube and a suction catheter having an outer diameter substantially smaller than the internal diameter of said series of ridges for preventing sticking on insertion of the catheter into said tube.
Claim 2
Dependent Claim
61 words
A tracheostomy or endotracheal tube formed from a flexible rubber material and including a series of thin ridges on the inner surface of said tube for preventing sticking between said tube and a suction catheter having an outer diameter substantially smaller than the internal diameter of said series of ridges for preventing sticking on insertion of the catheter into said tube.
Claim 3
Dependent Claim
80 words
An endotracheal or tracheostomy tube and a suction catheter adapted to be inserted through the tube, a continuous series of closely spaced ridges integral with said catheter for reducing the surface area contact between the inside surface of the tube and the outside surface of the catheter, said series of ridges having an outside diameter substantially smaller than the inside diameter of said tube, each ridge terminating in a thin line extending the full length of said tube or catheter.
Claim 4
Dependent Claim
80 words
An endotracheal or tracheostomy tube and a suction catheter adapted to be inserted through the tube, a continuous series of closely spaced ridges integral with said catheter for reducing the surface area contact between the inside surface of the tube and the outside surface of the catheter, said series of ridges having an outside diameter substantially smaller than the inside diameter of said tube, each ridge terminating in a thin line extending the full length of said tube or catheter.
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |