US3725522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of balloon-type catheters
Assignee: Individual
•
Filing: 1971-07-12
•
Granted: 1973-04-03
•
Expires: 1991-07-12
Abstract
Abstract The distal ends of plastic catheters, particularly endotracheal tubes, that have both a major lumen and a secondary lumen in the wall are finished to seal the secondary lumen at its distal end and create an angled distal end on the catheter with a smooth convex surface tip by a molding operation preformed in a vented mold structured to maintain the full opening of the major lumen in the finished distal end.
Inventors
- 👤 D Sheridan
- 👤 I Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:43
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/001; A61M25/01; A61M25/0105; A61M25/0108; A61M25/10; A61M25/1027; A61M25/1036
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
30 words
The method of claim 1 wherein said catheter is an endotracheal tube having a permanent arcuate shape and said secondary lumen is on the inside curve of said arcuate shape.
Claim 2
Dependent Claim
26 words
The method of claim 1 wherein the mold is cooled below the plastic flow temperature of the catheter before the catheter is withdrawn from the mold.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said temperature to which said mold is heated is between about 170*-450*F.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |