US4176659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter with measurement electrodes
Assignee: Individual
•
Filing: 1977-07-19
•
Granted: 1979-12-04
•
Expires: 1997-07-19
Abstract
Abstract A catheter is provided which comprises a tubular body that defines a passage therewithin terminating in an axially-facing opening at the tip end of the catheter, the opening serving as a sampling port. A pair of annular electrodes are arranged in spaced relationship around the sampling port on the rim of the open end and are connected to suitable measuring equipment.
Inventors
- 👤 Peter Rolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:29
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1468; A61B5/1473; A61M; A61M25/00; A61M25/0067; A61M25/0082
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A catheter comprising a tubular body which defines therewithin a passage which extends to an axially-facing open end of the tubular body and which serves as a sampling port at the tip of the catheter, said catheter further comprising first and second annular electrodes which are arranged in spaced relationship on the rim of the said open end around the sampling port, and electrical connection means for connecting said first and second electrodes to measuring equipment.
Claim 2
Dependent Claim
76 words
A catheter comprising a tubular body which defines therewithin a passage which extends to an axially-facing open end of the tubular body and which serves as a sampling port at the tip of the catheter, said catheter further comprising first and second annular electrodes which are arranged in spaced relationship on the rim of the said open end around the sampling port, and electrical connection means for connecting said first and second electrodes to measuring equipment.
Claim 3
Dependent Claim
26 words
A catheter as claimed in claim 1, wherein an end portion of the tubular body which includes the tip of the catheter comprises poly vinyl chloride.
Claim 4
Dependent Claim
22 words
A catheter as claimed in claim 1, wherein the said first and second annular electrodes are vacuum deposited on the said rim.
Claim 5
Dependent Claim
13 words
A catheter as claimed in claim 1, wherein the said electrodes comprise silver.
Claim 6
Dependent Claim
36 words
A catheter as claimed in claim 1, wherein the tubular body comprises a main elongate tubular part and tubular end portion secured to said tubular part, said tubular end portion including the tip of the catheter.
Claim 7
Dependent Claim
28 words
A catheter as claimed in claim 5, wherein part of the said tubular end portion fits coaxially within an end portion of the said main elongate tubular part.
Claim 8
Dependent Claim
25 words
A catheter as claimed in claim 1, wherein the said rim, including the first and second annular electrodes, is covered by a gas diffusion membrane.
Claim 9
Dependent Claim
24 words
A catheter as claimed in claim 1, wherein the said rim, including the first and second annular electrodes, is covered by an electrolytic material.
References Cited (Backward Citations)
US3682159A
Cited
US3729008A
Cited
US3878830A
Cited
US4020830A
Cited
US4020830B1
Cited
US4041933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |