US3176583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide field microscope objective
Assignee: Ernst Leitz Wetzlar GmbH
•
Filing: 1962-09-18
•
Granted: 1965-04-06
•
Expires: 1982-09-18
Abstract
No abstract record available.
Inventors
- 👤 Klein Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:48
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
150 words
A WIDE FIELD MICROSCOPE OBJECTIVE FOR FOCUSING THE IMAGE OF AN OBJECT AT A PREDETERMINED FOCAL PLANE SPACED FROM SAID OBJECT, SAID OBJECT BEING ILLUMINATED BY LIGHT PASSING THROUGH SAID OBJECTIVE TO SAID OBJECT, SAID OBJECTIVE COMPRISING: A NEGATIVE LENS MEANS LOCATED BETWEEN SAID PLANE AND SAID OBJECT; FIRST POSITIVE LENS MEANS LOCATED BETWEEN SAID NEGATIVE LENS MEANS AND SAID PLANE, SAID NEGATIVE LENS MEANS AND SAID FIRST POSITIVE LENS MEANS BEING DIMENSIONED TO CONSTITUTE A TELELENS SYSTEM; AND SECOND POSITIVE LENS MEANS POSITIONED BETWEEN SAID NEGATIVE LENS MEANS SAID OBJECT, SAID SECOND POSITIVE LENS MEANS BEING DIMENSIONED TO RENDER ILLUMINATING LIGHT RAYS PASSING THROUGH SAID TELELENS SYSTEM TO SAID OBJECT SUBSTANTIALLY PARALLEL WITHIN EACH BUNDLE, WHEREBY SAOD RAYS ARE RETROFLECTIVELY REFLECTED FROM SAID OBJECT BACK INTO SAID SECOND POSITIVE LENS MEANS, ALL OF SAID LENS MEANS BEING DIMENSIONED TO FORM A REAL IMAGE OF SAID OBJECT AT SAID PLANE.
References Cited (Backward Citations)
US2146506A
Cited
US2791937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |