US3343544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic surgical instrument
Assignee: Alcon Vision LLC
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Filing: 1965-12-21
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Granted: 1967-09-26
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Expires: 1985-12-21
Abstract
No abstract record available.
Inventors
- 👤 Crawford B Dunn
- 👤 Crawford Guy Glenworth
- 👤 Eldon G Weston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:30
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A LIGHTWEIGHT COMPACT SELF-CONTAINED CRYOGENIC SURGICAL INSTRUMENT COMPRISING, (A) A HOLLOW RECEPTACLE FOR RECEIVING A VALVED CONTAINER OF REFRIGERANT UNDER PRESSURE, (B) AN EXPANSION CHAMBER COMMUNICATING WITH THE FORWARD END OF SAID RECEPTACLE, (C) A VALVE ACTUATOR STOP WITHIN SAID EXPANSION CHAMBER ADAPTED TO ENGAGE AND OPEN THE VALVE OF THE CONTAINER WHEN THE CONTAINER IS PRESSED FORWARDLY, (D) AN ELONGATED SOLID HEAT-CONDUCTIVE PROBE RIGIDLY SUPPORTED INTERMEDIATE ITS ENDS IN A WALL OF SAID EXPANSION CHAMBER WITH THE INNER END OF SAID PROBE EXTENDING INTO SAID EXPANSION CHAMBER, SAID PROBE HAVING A RELATIVELY SMALL CROSS-SECTIONAL DIMENSION IN COMPARISON TO ITS LENGTH, (E) A MANUALLY MOVABLE PUSHER ON SAID RECEPTACLE ADAPTED TO PRESS THE CONTAINER FORWARDLY AGAINST SAID STOP FOR OPENING THE VALVE TO DISPENSE THE REFRIGERANT INTO SAID EXPANSION CHAMBER, (F) AND VENT MEANS FORMED IN THE PUSHER AND IN THE REAR END OF THE RECEPTACLE FOR EXHAUSTING SPENT GASES FROM SAID INSTRUMENT
Claim 2
Dependent Claim
153 words
A LIGHTWEIGHT COMPACT SELF-CONTAINED CRYOGENIC SURGICAL INSTRUMENT COMPRISING, (A) A HOLLOW RECEPTACLE FOR RECEIVING A VALVED CONTAINER OF REFRIGERANT UNDER PRESSURE, (B) AN EXPANSION CHAMBER COMMUNICATING WITH THE FORWARD END OF SAID RECEPTACLE, (C) A VALVE ACTUATOR STOP WITHIN SAID EXPANSION CHAMBER ADAPTED TO ENGAGE AND OPEN THE VALVE OF THE CONTAINER WHEN THE CONTAINER IS PRESSED FORWARDLY, (D) AN ELONGATED SOLID HEAT-CONDUCTIVE PROBE RIGIDLY SUPPORTED INTERMEDIATE ITS ENDS IN A WALL OF SAID EXPANSION CHAMBER WITH THE INNER END OF SAID PROBE EXTENDING INTO SAID EXPANSION CHAMBER, SAID PROBE HAVING A RELATIVELY SMALL CROSS-SECTIONAL DIMENSION IN COMPARISON TO ITS LENGTH, (E) A MANUALLY MOVABLE PUSHER ON SAID RECEPTACLE ADAPTED TO PRESS THE CONTAINER FORWARDLY AGAINST SAID STOP FOR OPENING THE VALVE TO DISPENSE THE REFRIGERANT INTO SAID EXPANSION CHAMBER, (F) AND VENT MEANS FORMED IN THE PUSHER AND IN THE REAR END OF THE RECEPTACLE FOR EXHAUSTING SPENT GASES FROM SAID INSTRUMENT
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |