Patent US3879111A successfully refreshed from Google Patents.
US3879111A
Expired / Lapsed
US
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Microscope objective
Assignee: Olympus Corp
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Filing: 1974-02-05
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Granted: 1975-04-22
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Expires: 1994-02-05
Abstract
Abstract A microscope objective comprising eight lenses arranged in five components successively, the first component being a negative meniscus lens with a forwardly concave front face, the second component being a positive meniscus lens with a forwardly concave front face, the third component being a biconvex doublet, the fourth component being a positive meniscus doublet with a forwardly concave front face, and the fifth component being a negative meniscus doublet with a forwardly convex front face.
Inventors
- 👤 Atsuo Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:28
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A microscope objective comprising eight lenses arranged in five components successively, the first component being a negative meniscus lens with a forwardly concave front face, the second component being a positive meniscus lens with a forwardly concave front face, the third component being a biconvex doublet, the fourth component being a positive meniscus doublet with a forwardly concave front face, and the fifth component being a negative meniscus doublet with a forwardly convex front face, and constructed according to the constructional data given herebelow:
Claim 2
Dependent Claim
84 words
A microscope objective comprising eight lenses arranged in five components successively, the first component being a negative meniscus lens with a forwardly concave front face, the second component being a positive meniscus lens with a forwardly concave front face, the third component being a biconvex doublet, the fourth component being a positive meniscus doublet with a forwardly concave front face, and the fifth component being a negative meniscus doublet with a forwardly convex front face, and constructed according to the constructional data given herebelow:
References Cited (Backward Citations)
US3481665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |