US3272071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope objective having two doublets
Assignee: Bausch and Lomb Inc
•
Filing: 1963-06-14
•
Granted: 1966-09-13
•
Expires: 1983-06-14
Abstract
No abstract record available.
Inventors
- 👤 George F Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:18
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
AN OBJECTIVE FOR MICROSCOPES AND THE LIKE COMPRISING A FRONT DOUBLET LENS AND A REAR DOUBLET LENS AXIALLY ALIGNED THEREWITH AND SPACED THEREFROM SO AS TO FORM AN IMAGE OF AN OBJECT SURFACE AND ADDITIONALLY FORM AN EXIT PUPIL SUBSTANTIALLY IN THE PLANE OF THE REAR VERTEX OF THE REARMOST LENS, SAID FRONT DOUBLET LENS CONSISTING OF A FRONT NEGATIVE MENISCUS LENS ELEMENT I WHICH IS IN CONTACT WITH A REAR DOUBLET CONVEX LENS ELEMENT II, SAID REAR DOUBLET LENS CONSISTING OF A DOUBLE CONCAVE LENS ELEMENT III WHICH IS IN CONTACT WITH A REAR DOUBLE CONVEX LENS ELEMENT IV, THE VALUES OF FOCAL LENGTHS OF THE SUCCESSIVE LENS ELEMENTS I TO IV, THE VALUES OF THE SUCCESSIVE LENS THICKNESSES T1 TO T4, THE VALUES OF THE SUCCESSIVE AIR SPACES S1 TO S3 BETWEEN THE OBJECT AND IMAGE, AS WELL AS THE REFRACTIVE INDICES ND AND ABBE NUMBER V HAVING THE NUMERICAL VALUES STATED IN THE TABLE HEREBELOW,
Claim 2
Dependent Claim
158 words
AN OBJECTIVE FOR MICROSCOPES AND THE LIKE COMPRISING A FRONT DOUBLET LENS AND A REAR DOUBLET LENS AXIALLY ALIGNED THEREWITH AND SPACED THEREFROM SO AS TO FORM AN IMAGE OF AN OBJECT SURFACE AND ADDITIONALLY FORM AN EXIT PUPIL SUBSTANTIALLY IN THE PLANE OF THE REAR VERTEX OF THE REARMOST LENS, SAID FRONT DOUBLET LENS CONSISTING OF A FRONT NEGATIVE MENISCUS LENS ELEMENT I WHICH IS IN CONTACT WITH A REAR DOUBLET CONVEX LENS ELEMENT II, SAID REAR DOUBLET LENS CONSISTING OF A DOUBLE CONCAVE LENS ELEMENT III WHICH IS IN CONTACT WITH A REAR DOUBLE CONVEX LENS ELEMENT IV, THE VALUES OF FOCAL LENGTHS OF THE SUCCESSIVE LENS ELEMENTS I TO IV, THE VALUES OF THE SUCCESSIVE LENS THICKNESSES T1 TO T4, THE VALUES OF THE SUCCESSIVE AIR SPACES S1 TO S3 BETWEEN THE OBJECT AND IMAGE, AS WELL AS THE REFRACTIVE INDICES ND AND ABBE NUMBER V HAVING THE NUMERICAL VALUES STATED IN THE TABLE HEREBELOW,
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |