US3158677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide angle oculars
Assignee: Individual
•
Filing: 1960-12-19
•
Granted: 1964-11-24
•
Expires: 1980-12-19
Abstract
No abstract record available.
Inventors
- 👤 Pierre J B Lacomme
- 👤 Jean L Demarcq
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:27
CPC Classifications
G; G02; G02B; G02B25/00; G02B25/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
CONVERGENT OCULAR OF WIDE APPARENT FIELD COMPRISING AT LEAST TWO GROUPS OF LENSES, ONE GROUP CONSTITUTING AN EYE GLASS AND THE OTHER GROUP CONSTITUTING A FIELD GLASS, SAID FIELD GLASS COMPRISING AT LEAST TWO LENSES AND HAVING TWO EXTERNAL SURFACES, THE CONCAVITY OF SAID SURFACES BEING ADAPTED FOR SIMULTANEOUS ORIENTATION TOWARDS AN OBJECTIVE, SAID FIELD GLASS COMPRISING CEMENTED LENSES WHOSE TOTAL THICKNESS IS BETWEEN 0.7F AND 1.6F, F BEING THE FOCAL LENGTH OF THE OCULAR, THE FACE OF SAID FIELD GLASS REMOTE FROM SAID EYE GLASS HAVING A RADIUS OF CURVATURE BETWEEN 1.3F AND 2F AND THE FACE OF SAID FIELD GLASS ADJACENT SAID EYE GLASS HAVING A RADIUS OF CURVATURE BETWEEN 1.5F AND 2.3F, SAID EYE GLASS HAVING A SURFACE OF ROTATION FACING SAID FIELD GLASS WITH A MERIDIAN DEFINED BY THE FOLLOWING ALGEBRAIC EQUATIONS:
Claim 2
Dependent Claim
136 words
CONVERGENT OCULAR OF WIDE APPARENT FIELD COMPRISING AT LEAST TWO GROUPS OF LENSES, ONE GROUP CONSTITUTING AN EYE GLASS AND THE OTHER GROUP CONSTITUTING A FIELD GLASS, SAID FIELD GLASS COMPRISING AT LEAST TWO LENSES AND HAVING TWO EXTERNAL SURFACES, THE CONCAVITY OF SAID SURFACES BEING ADAPTED FOR SIMULTANEOUS ORIENTATION TOWARDS AN OBJECTIVE, SAID FIELD GLASS COMPRISING CEMENTED LENSES WHOSE TOTAL THICKNESS IS BETWEEN 0.7F AND 1.6F, F BEING THE FOCAL LENGTH OF THE OCULAR, THE FACE OF SAID FIELD GLASS REMOTE FROM SAID EYE GLASS HAVING A RADIUS OF CURVATURE BETWEEN 1.3F AND 2F AND THE FACE OF SAID FIELD GLASS ADJACENT SAID EYE GLASS HAVING A RADIUS OF CURVATURE BETWEEN 1.5F AND 2.3F, SAID EYE GLASS HAVING A SURFACE OF ROTATION FACING SAID FIELD GLASS WITH A MERIDIAN DEFINED BY THE FOLLOWING ALGEBRAIC EQUATIONS:
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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |