US3338090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Applanation tonometer
Assignee: Bausch and Lomb Inc
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Filing: 1964-06-30
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Granted: 1967-08-29
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Expires: 1984-06-30
Abstract
No abstract record available.
Inventors
- 👤 Jr William F Coombs
- 👤 Robert J Meltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:25
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
APPARATUS FOR USE IN AN APPLANATION TONOMETER FOR INDICATING THE MAGNITUDE OF THE AREA OF AN EYE CONTACTED BY SAID TONOMETER COMPRISING A PROBE RECIPROCALLY MOUNTED WITHIN A HOUSING MEANS, AN OPTICALLY TRANSPARENT TIP IN SAID PROBE ADAPTED FOR ENGAGING A SURFACE OF AN EYE AND PRODUCING AN IMAGE OF A MENISCUS FORMED ABOUT THE PERIPHERY OF CONTACT OF SAID TIP, AN OPTICAL SYSTEM POSITIONED TO TRANSMIT LIGHT THROUGH THE PROBE AND TO RECEIVE REFLECTED LIGHT THEREFROM, ILLUMINATING MEANS INCLUDING A DICHROIC MIRROR DIRECTING ILLUMINATION TOWARD SAID OPTICAL SYSTEM FOR ILLUMINATING THE TIP OF SAID PROBE, PHOTOSENSING MEANS GENERATING A SIGNAL RESPONSIVE TO THE AREA OF CONTACT FORMED ON SAID TIP, MEANS RECEIVING THE SIGNAL FROM SAID PHOTOSENSING MEANS AND INDICATING THE MAGNITUDE OF THE AREA OF THE ENGAGING SURFACE OF SAID TIP WITH THE SURFACE OF THE EYE.
Claim 2
Dependent Claim
139 words
APPARATUS FOR USE IN AN APPLANATION TONOMETER FOR INDICATING THE MAGNITUDE OF THE AREA OF AN EYE CONTACTED BY SAID TONOMETER COMPRISING A PROBE RECIPROCALLY MOUNTED WITHIN A HOUSING MEANS, AN OPTICALLY TRANSPARENT TIP IN SAID PROBE ADAPTED FOR ENGAGING A SURFACE OF AN EYE AND PRODUCING AN IMAGE OF A MENISCUS FORMED ABOUT THE PERIPHERY OF CONTACT OF SAID TIP, AN OPTICAL SYSTEM POSITIONED TO TRANSMIT LIGHT THROUGH THE PROBE AND TO RECEIVE REFLECTED LIGHT THEREFROM, ILLUMINATING MEANS INCLUDING A DICHROIC MIRROR DIRECTING ILLUMINATION TOWARD SAID OPTICAL SYSTEM FOR ILLUMINATING THE TIP OF SAID PROBE, PHOTOSENSING MEANS GENERATING A SIGNAL RESPONSIVE TO THE AREA OF CONTACT FORMED ON SAID TIP, MEANS RECEIVING THE SIGNAL FROM SAID PHOTOSENSING MEANS AND INDICATING THE MAGNITUDE OF THE AREA OF THE ENGAGING SURFACE OF SAID TIP WITH THE SURFACE 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 |