Patent US2361992A successfully refreshed from Google Patents.
Patent US3338089A successfully refreshed from Google Patents.
US3338089A
Expired / Lapsed
US
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Applanation tonometer
Assignee: Bausch and Lomb Inc
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Filing: 1964-06-29
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Granted: 1967-08-29
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Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 Jr William F Coombs
- 👤 Alexander E Martens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:37
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
AN APPLANATION TONOMETER COMPRISING A PROBE HAVING A SURFACE ADAPTED FOR ENGAGING THE CORNEA OF AN EYE, SUPPORTING MEANS SUPPORTING SAID PROBE FOR RELATIVE MOVEMENT IN RESPONSE TO THE FORCE APPLIED TO SAID PROBE, A TRANSDUCER ON SAID SUPPORTING MEANS COUPLED TO SAID PROBE FOR GENERATING A SIGNAL CORRESPONDING TO THE FORCE APPLIED TO SAID PROBE, RECORDING MEANS RECEIVING SAID SIGNAL FOR INDICATING THE FORCE APPLIED ON SAID PROBE, AN OPTICAL SYSTEM RELAYING AN IMAGE CORRESPONDING TO THE AREA OF CONTACT OF SAID PROBE WITH THE EYE, PHOTOSENSING MEANS RECEIVING SAID IMAGE OF THE AREA OF CONTACT OF SAID PROBE, ELECTRICAL MEANS RECEIVING SAID SIGNAL FROM SAID PHOTOSENSING MEANS FOR GENERATING A HOLD SIGNAL WHEN SAID PROBE CONTACTS A PREDETERMINED SIZE OF AREA OF THE EYE, AND CIRCUIT MEANS APPLYING SAID HOLD SIGNAL TO SAID RECORDING MEANS TO FIX THE READING ON SAID RECORDING MEANS WHEN THE END SURFACE OF SAID PROBE CONTACTS SAID PREDETERMINED SIZE OF AREA OF THE EYE.
Claim 2
Dependent Claim
161 words
AN APPLANATION TONOMETER COMPRISING A PROBE HAVING A SURFACE ADAPTED FOR ENGAGING THE CORNEA OF AN EYE, SUPPORTING MEANS SUPPORTING SAID PROBE FOR RELATIVE MOVEMENT IN RESPONSE TO THE FORCE APPLIED TO SAID PROBE, A TRANSDUCER ON SAID SUPPORTING MEANS COUPLED TO SAID PROBE FOR GENERATING A SIGNAL CORRESPONDING TO THE FORCE APPLIED TO SAID PROBE, RECORDING MEANS RECEIVING SAID SIGNAL FOR INDICATING THE FORCE APPLIED ON SAID PROBE, AN OPTICAL SYSTEM RELAYING AN IMAGE CORRESPONDING TO THE AREA OF CONTACT OF SAID PROBE WITH THE EYE, PHOTOSENSING MEANS RECEIVING SAID IMAGE OF THE AREA OF CONTACT OF SAID PROBE, ELECTRICAL MEANS RECEIVING SAID SIGNAL FROM SAID PHOTOSENSING MEANS FOR GENERATING A HOLD SIGNAL WHEN SAID PROBE CONTACTS A PREDETERMINED SIZE OF AREA OF THE EYE, AND CIRCUIT MEANS APPLYING SAID HOLD SIGNAL TO SAID RECORDING MEANS TO FIX THE READING ON SAID RECORDING MEANS WHEN THE END SURFACE OF SAID PROBE CONTACTS SAID PREDETERMINED SIZE OF AREA OF THE EYE.
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) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |