US3572315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravascular catheter with gas-permeable tip
Assignee: Individual
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Filing: 1968-11-26
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Granted: 1971-03-23
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Expires: 1988-11-26
Abstract
Abstract APPARATUS FOR EXTRACTING GASEOUS COMPONENTS FROM A LIQUID FOR ANALYSIS. A CATHETER HAVING A SEMI-PERMEABLE MEMBRANE AT ITS LEADING END IS INSERTED INTO THE BLOOD STREAM OF A PATIENT, THE MEMBRANE BEING PERMEABLE TO GASES CONTAINED IN WHOLE BLOOD BUT IMPERMEABLE WITH RESPECT TO THE BLOOD ITSELF. THE OPPOSITE END OF THE CATHETER IS CONNECTED TO ANALYSIS APPARATUS, SUCH AS A MASS SPECTROMETER, AND SUBATMOSPHERIC PRESSURE MEANS INDUCES GASEOUS FLOW FROM THE BLOOD STREAM THROUGH THE MEM- BRANE AND INTO THE CATHETER AND THROUGH THE ANALYSIS APPARATUS.
Inventors
- 👤 John S Cullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:52
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |