US3339997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bifocal ophthalmic lens having different color distance and near vision zones
Assignee: W-J (DELAWARE) Inc
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Filing: 1962-07-30
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Granted: 1967-09-05
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Newton K Wesley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:39
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/06; G02C7/10; G02C7/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A BIFOCAL OPHTHALMIC LENS FOR CORRECTING THE VISION OF A PATIENT, SAID LENS HAVING A FAR ZONE AND A NEAR ZONE OF THE SAME REFRACTIVE INDEX, SAID FAR ZONE CHARACTERIZED BY BEING COLORED IN THE RANGE OF THE LONGER WAVE-LENGTH HALF OF THE VISIBLE SPECTRUM, THE POSTERIOR SURFACE OF BOTH ZONES HAVING ONE COMMON RADIUS OF CURVATURE AND THE ANTERIOR SURFACE OF BOTH ZONES HAVING ANOTHER COMMON RADIUS OF CURVATURE RELATIVE TO SAID FIRST RADIUS AND CURCATURE MODIFIED TO COMPENSATE FOR THE COLOR OF SAID
Claim 2
Dependent Claim
85 words
A BIFOCAL OPHTHALMIC LENS FOR CORRECTING THE VISION OF A PATIENT, SAID LENS HAVING A FAR ZONE AND A NEAR ZONE OF THE SAME REFRACTIVE INDEX, SAID FAR ZONE CHARACTERIZED BY BEING COLORED IN THE RANGE OF THE LONGER WAVE-LENGTH HALF OF THE VISIBLE SPECTRUM, THE POSTERIOR SURFACE OF BOTH ZONES HAVING ONE COMMON RADIUS OF CURVATURE AND THE ANTERIOR SURFACE OF BOTH ZONES HAVING ANOTHER COMMON RADIUS OF CURVATURE RELATIVE TO SAID FIRST RADIUS AND CURCATURE MODIFIED TO COMPENSATE FOR THE COLOR OF SAID
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |