US3659588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter apparatus
Assignee: Medtronic Inc
•
Filing: 1970-04-08
•
Granted: 1972-05-02
•
Expires: 1990-04-08
Abstract
Abstract A catheter having walls of which at least a portion is electrically conductive and has an electrical resistivity approximately equal to the electrical resistivity of blood.
Inventors
- 👤 Alan R Kahn
- 👤 Florence A Stroebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:26
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; A61M; A61M25/00; A61M25/0009; A61M25/0043; A61M25/005; Y; Y10; Y10S; Y10S128/00; Y10S128/908
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
Catheter apparatus comprising tubular means having walls, at least a portion of said walls being electrically conductive and having an electrical resistivity of approximately from 12 ohmcentimeters to 1,200 ohm-centimeters.
Claim 2
Dependent Claim
30 words
Catheter apparatus comprising tubular means having walls, at least a portion of said walls being electrically conductive and having an electrical resistivity of approximately from 12 ohmcentimeters to 1,200 ohm-centimeters.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 in which all of said walls are electrically conductive and have an electrical resistivity of approximately from 12 ohm-centimeters to 1,200 ohm-centimeters.
Claim 4
Dependent Claim
25 words
The apparatus of claim 1 in which the electrical resistivity of said portion of said walls is approximately equal to the electrical resistivity of blood.
Claim 5
Dependent Claim
28 words
The apparatus of Claim 3 in which the electrical resistivity of said portion of said walls is approximately from one-tenth to 10 times the electrical resistivity of blood.
Claim 6
Dependent Claim
35 words
The apparatus of claim 1 in which said portion of said walls comprises a part of said walls adapted to be adjacent to the skin of an animal during intracorporeal application of said catheter apparatus.
Claim 7
Dependent Claim
15 words
The apparatus of claim 1 in which said portion of said walls is electrically semiconductive.
Claim 8
Dependent Claim
42 words
Improved catheter apparatus comprising: tubular means defining a lumen for the passage of fluids into an animal''s body; and said means being electrically semiconductive and having a substantially uniform electrical resistivity selected in the range from approximately 12 ohm-centimeters to 1,200 ohm-centimeters.
Claim 9
Dependent Claim
42 words
Improved catheter apparatus comprising: tubular means defining a lumen for the passage of fluids into an animal''s body; and said means being electrically semiconductive and having a substantially uniform electrical resistivity selected in the range from approximately 12 ohm-centimeters to 1,200 ohm-centimeters.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |