Patent US4459255A successfully refreshed from Google Patents.
US4459255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter distal end finishing method
Assignee: Tyco International US Inc
•
Filing: 1982-10-18
•
Granted: 1984-07-10
•
Expires: 2002-10-18
Abstract
Abstract The distal ends of plastic catheters are finished to form smoothly rounded tips by forcing the distal ends into a heated cup-like mold and at the same time applying suction to the central lumen of the catheter either via the proximal end of the lumen or via a raised central portion of the mold.
Inventors
- 👤 David S. Sheridan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:17
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/001; B; B29; B29C; B29C57/00; B29L; B29L2031/00; B29L2031/753; B29L2031/7542; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A method of finishing the distal end of a plastic catheter having a major central lumen which comprises: providing a cup-like mold contoured to the shape desired for said finished distal end including a raised central portion to project into said central lumen when a catheter is inserted in said mold, heating said mold to a temperature above the plastic flow temperature of said catheter, forcing said distal end of said catheter into said mold, and simultaneously applying suction to said central lumen of said catheter.
Claim 2
Independent Claim
86 words
A method of finishing the distal end of a plastic catheter having a major central lumen which comprises: providing a cup-like mold contoured to the shape desired for said finished distal end including a raised central portion to project into said central lumen when a catheter is inserted in said mold, heating said mold to a temperature above the plastic flow temperature of said catheter, forcing said distal end of said catheter into said mold, and simultaneously applying suction to said central lumen of said catheter.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said suction is applied to the proximal end of said catheter lumen.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein said suction is applied through said raised central portion of said mold.
References Cited (Backward Citations)
US2976571A
Cited
US3725522A
Cited
US4165062A
Cited
US4215087A
Cited
US4174241A
Cited
US4292270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |