US3169459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determining surface contours of an eye
Assignee: Individual
•
Filing: 1963-03-11
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Granted: 1965-02-16
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Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 Michael A Friedberg
- 👤 William J Dimond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:58
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/14; A61B3/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A PHOTOGRAMMETRIC METHOD OF ASCERTAINING THE SURFACE CONTOURS OF AN EYE TO BE FITTED WITH A CONTACT LENS THE STEPS OF DEPICTING ON THE EXPOSED SURFACE OF THE SUBSTANTIALLY TRANSPARENT TEAR LAYER WHICH OVERLIES THE ANTERIOR EPITHELIUM OF THE CORNEA AND SCLERA OF THE EYE A MULTIPLICITY OF PHOTOGRAPHICALLY REPRODUCIBLE CONTIGUOUS AREAS OF CONTRASTING LIGHT DENSITY TO THEREBY RENDER DISCERNIBLE SURFACE IRREGULARITIES EXISTING IN THE EXPOSED SURFACE OF SAID TEAR LAYER, INCREASING THE PHOTOGRAPHIC REPRODUCIBILITY OF THE PATTERNED SURFACE OF THE TEAR LAYER BY CAUSING THE TEAR LAYER OF THE CORNEA AND SCLERA OF THE EYE TO ABSORB A BIOLOGICAL STAIN CAPABLE OF EMITTING A VISIBLE LIGHT RAY IN THE PRESENCE OF ULTRAVIOLET LIGHT, DIRECTING AN ULTRAVIOLET LIGHT ONTO THE STAINED TEAR LAYER OF SAID EYE THEREBY TO ACCENTUATE THE CONTRAST BETWEEN SAID CONTIGUOUS AREAS OF CONTRASTING LIGHT DENSITY, AND STEREOSCOPICALLY PHOTOGRAPHING SAID CONTINUOUS AREAS.
Claim 2
Dependent Claim
146 words
IN A PHOTOGRAMMETRIC METHOD OF ASCERTAINING THE SURFACE CONTOURS OF AN EYE TO BE FITTED WITH A CONTACT LENS THE STEPS OF DEPICTING ON THE EXPOSED SURFACE OF THE SUBSTANTIALLY TRANSPARENT TEAR LAYER WHICH OVERLIES THE ANTERIOR EPITHELIUM OF THE CORNEA AND SCLERA OF THE EYE A MULTIPLICITY OF PHOTOGRAPHICALLY REPRODUCIBLE CONTIGUOUS AREAS OF CONTRASTING LIGHT DENSITY TO THEREBY RENDER DISCERNIBLE SURFACE IRREGULARITIES EXISTING IN THE EXPOSED SURFACE OF SAID TEAR LAYER, INCREASING THE PHOTOGRAPHIC REPRODUCIBILITY OF THE PATTERNED SURFACE OF THE TEAR LAYER BY CAUSING THE TEAR LAYER OF THE CORNEA AND SCLERA OF THE EYE TO ABSORB A BIOLOGICAL STAIN CAPABLE OF EMITTING A VISIBLE LIGHT RAY IN THE PRESENCE OF ULTRAVIOLET LIGHT, DIRECTING AN ULTRAVIOLET LIGHT ONTO THE STAINED TEAR LAYER OF SAID EYE THEREBY TO ACCENTUATE THE CONTRAST BETWEEN SAID CONTIGUOUS AREAS OF CONTRASTING LIGHT DENSITY, AND STEREOSCOPICALLY PHOTOGRAPHING SAID CONTINUOUS AREAS.
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) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |