Patent US3731376A successfully refreshed from Google Patents.
US3731376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a catheter
Assignee: Electro Catheter Corp
•
Filing: 1971-01-22
•
Granted: 1973-05-08
•
Expires: 1991-01-22
Abstract
Abstract Electro-conductive catheters and methods of manufacture thereof.
Inventors
- 👤 B Ackerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:20
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0012; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/0565; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921; Y10T29/49211; Y10T29/49213
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
Method of manufacturing a catheter comprising at least the steps of forming a smooth nose at a distal end of an elongate bodily flexible core of stranded wire, positioning a sheath having distal and proximate end portions over substantially the entire longitudinal extent of the core, and securing the end portions of the sheath with the core to define a bodily flexible catheter adapted to be readily rotated for steering, or the like, wherein said step of securing comprises the step of sealing the interstices between the core wires.
Claim 2
Dependent Claim
89 words
Method of manufacturing a catheter comprising at least the steps of forming a smooth nose at a distal end of an elongate bodily flexible core of stranded wire, positioning a sheath having distal and proximate end portions over substantially the entire longitudinal extent of the core, and securing the end portions of the sheath with the core to define a bodily flexible catheter adapted to be readily rotated for steering, or the like, wherein said step of securing comprises the step of sealing the interstices between the core wires.
Claim 3
Dependent Claim
34 words
Method defined in claim 1 wherein the step of forming comprises positioning a metal sleeve on the distal end portion of the core and soldering the sleeve with the core to define an electrode.
Claim 4
Dependent Claim
29 words
Method defined in claim 2 wherein said step of positioning comprises the step of separating the core prior to soldering to enhance bonding between the sleeve and the core.
Claim 5
Dependent Claim
24 words
Method defined in claim 3 wherein said step of soldering provides a blunt, rounded end to the electrode, whereby said smooth nose is defined.
Claim 6
Dependent Claim
17 words
Method defined in claim 4 wherein said step of securing comprises securing the sheath with the nose.
Claim 7
Dependent Claim
57 words
Method defined in claim 2 wherein said step of positioning comprises the steps of passing the distal end portion of the core through the sleeve, spreading the projecting end portion of the core laterally outwardly of the sleeve and withdrawing the core until the distal end is entirely within the sleeve and engaged with the interior thereof.
Claim 8
Dependent Claim
20 words
Method defined in claim 2 wherein said step of soldering comprises dip soldering in a molten bath of silver solder.
Claim 9
Dependent Claim
20 words
Method defined in claim 2 comprising the additional step of applying solder to a proximal end portion of the core.
Claim 10
Dependent Claim
26 words
Method defined in claim 3 wherein the core comprises twisted regular lay wire rope, and said step of positioning comprises at least the step of untwisting.
Claim 11
Dependent Claim
54 words
Method defined in claim 1 wherein said sheath comprises a thermoplastic material, and said step of securing comprises the step of heating the end portions of the sheath to enable said end portions to flow around and between the wires of the core at a corresponding end portion thereof to form a bond therewith.
Claim 12
Dependent Claim
20 words
Method defined in claim 10 further comprising separating the wires of the core at the end portion to be sealed.
Claim 13
Dependent Claim
23 words
Method defined in claim 10 further comprising the additional step of positioning said end portions within a sleeve during such heating and sealing.
Claim 14
Dependent Claim
15 words
Method defined in claim 12 further comprising laterally confining the sheath material by said sleeve.
References Cited (Backward Citations)
US3198059A
Cited
US3244174A
Cited
US3348548A
Cited
US3333045A
Cited
US3340493A
Cited
US3264017A
Cited
US3426316A
Cited
US3474791A
Cited
US3466742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |