US5800487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryoprobe
Assignee: Endocare Inc
•
Filing: 1996-07-23
•
Granted: 1998-09-01
•
Expires: 2016-07-23
Abstract
Abstract Cryocoolers for use in cryosurgery and other applications comprising finned tube helical coil heat exchangers and a flow directing sheath covering portions of the heat exchanger coil and isolating portions of the heat exchanger coil from the outer sheath of the cryocooler. The size and shape of iceballs created by the probes is controlled by the extent and location of the flow directing sheath.
Inventors
- 👤 Paul W. Mikus
- 👤 Gregory L. Kelly
- 👤 Ralph K. Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:23
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/02; A; A61; A61B; A61B18/00; A61B18/02; A61B2018/00005; A61B2018/00041; A61B2018/0293; F25B2309/00; F25B2309/02; F25B2309/021; F25B2500/00; F25B2500/01; Y; Y10; Y10S; Y10S128/00; Y10S128/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A cryosurgical probe comprising: a tube capable of insertion into the body, said tube having a closed distal end for insertion into the body, said closed distal end forming an expansion chamber within the distal end of the tube; a finned tube coiled heat exchanger disposed within the tube, said heat exchanger having a Joule-Thomson nozzle on the distal end thereof and a high pressure gas supply line on the proximal end thereof, said finned tube coiled heat exchanger having a plurality of windings of the finned tube with interstitial gaps between the windings; a flow directing sheath disposed coaxially between the tube and the finned tube coiled heat exchanger, wherein the flow directing sheath protrudes radially inwardly into the interstitial gaps between the windings of the finned tube heat exchanger.
Claim 2
Dependent Claim
131 words
A cryosurgical probe comprising: a tube capable of insertion into the body, said tube having a closed distal end for insertion into the body, said closed distal end forming an expansion chamber within the distal end of the tube; a finned tube coiled heat exchanger disposed within the tube, said heat exchanger having a Joule-Thomson nozzle on the distal end thereof and a high pressure gas supply line on the proximal end thereof, said finned tube coiled heat exchanger having a plurality of windings of the finned tube with interstitial gaps between the windings; a flow directing sheath disposed coaxially between the tube and the finned tube coiled heat exchanger, wherein the flow directing sheath protrudes radially inwardly into the interstitial gaps between the windings of the finned tube heat exchanger.
References Cited (Backward Citations)
US3398738A
Cited
US3658066A
Cited
US3800552A
Cited
US3913581A
Cited
US4063560A
Cited
US4028907A
Cited
US4306568A
Cited
US4468935A
Cited
SU1217377A1
Cited
US5108390A
Cited
US5078713A
Cited
US4946460A
Cited
US5150579A
Cited
US5077979A
Cited
US5388415A
Cited
EP0608927A2
Cited
US5522870A
Cited
US5452582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |