US3115538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope objective
Assignee: Bausch and Lomb Inc
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Filing: 1962-03-22
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Granted: 1963-12-24
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Expires: 1982-03-22
Abstract
No abstract record available.
Inventors
- 👤 Paul L Ruben
- 👤 George F Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:53
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A LOW POWER MICROSCOPE OBJECTIVE COMPRISING FOUR OPTICALLY ALIGNED LENS MEMBERS WHICH ARE A FIRST, THIRD AND FOURTH POSITIVE LENS MEMBER NAMED FROM THE OBJECT SIDE TOWARD THE REAR, AND A DOUBLE CONCAVE SECOND LENS MEMBER, SAID FOURTH MEMBER BEING FORMED FROM A DOUBLE CONCAVE FRONT LENS ELEMENT IN CONTACT WITH A DOUBLE CONVEX REAR LENS ELEMENT, SAID OBJECTIVE HAVING A MAGNIFICATION OF 5X AND A NUMERICAL APERTURE OF SUBSTANTIALLY 0.10, THE NUMERICAL VALUES OF THE CONSTRUCTIONAL DATA FOR SAID OBJECTIVE BEING GIVEN IN THE TABLE OF MATHEMATICAL STATEMENTS HEREBELOW WHEREIN R1 TO R6 DESIGNATE THE RADII OF SUCCESSIVE LENS SURFACES, FA TO FE DESIGNATE THE FOCAL LENGTHS OF THE SUCCESSIVE LENS ELEMENTS, T1 TO T5 DESIGNATE
Claim 2
Dependent Claim
117 words
A LOW POWER MICROSCOPE OBJECTIVE COMPRISING FOUR OPTICALLY ALIGNED LENS MEMBERS WHICH ARE A FIRST, THIRD AND FOURTH POSITIVE LENS MEMBER NAMED FROM THE OBJECT SIDE TOWARD THE REAR, AND A DOUBLE CONCAVE SECOND LENS MEMBER, SAID FOURTH MEMBER BEING FORMED FROM A DOUBLE CONCAVE FRONT LENS ELEMENT IN CONTACT WITH A DOUBLE CONVEX REAR LENS ELEMENT, SAID OBJECTIVE HAVING A MAGNIFICATION OF 5X AND A NUMERICAL APERTURE OF SUBSTANTIALLY 0.10, THE NUMERICAL VALUES OF THE CONSTRUCTIONAL DATA FOR SAID OBJECTIVE BEING GIVEN IN THE TABLE OF MATHEMATICAL STATEMENTS HEREBELOW WHEREIN R1 TO R6 DESIGNATE THE RADII OF SUCCESSIVE LENS SURFACES, FA TO FE DESIGNATE THE FOCAL LENGTHS OF THE SUCCESSIVE LENS ELEMENTS, T1 TO T5 DESIGNATE
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) | 1966-12-23 | 1967-06-24 | 1967-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-23 | 1971-06-24 | 1971-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-23 | 1975-06-24 | 1975-12-24 | $7700.00 | Window Closed / Lapsed |