Patent US3572902A successfully refreshed from Google Patents.
US3572902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High magnification achromatic microscope objective having a wide, flat field
Assignee: Olympus Corp
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Filing: 1969-04-08
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Granted: 1971-03-30
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Expires: 1989-04-08
Abstract
Abstract A high magnification microscope objective which has a wide field of about the field number of 30; in which the curvature of the field is sufficiently eliminated and the in-axis chromatic aberration is completely eliminated to the extent which is achieved by an apochromatic objective.
Inventors
- 👤 Toshifumi Uetake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:32
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A microscope objective comprising: a forward lens group consisting of six lens elements of which the second and third lens elements from the object side are cemented, and the fifth and sixth lens elements from the object side are cemented; and a rearward lens group consisting of: four lens elements of which the second, third, and fourth lens elements from the object side are cemented, said lens elements having substantially the numerical data set forth in the following table:
Claim 2
Dependent Claim
79 words
A microscope objective comprising: a forward lens group consisting of six lens elements of which the second and third lens elements from the object side are cemented, and the fifth and sixth lens elements from the object side are cemented; and a rearward lens group consisting of: four lens elements of which the second, third, and fourth lens elements from the object side are cemented, said lens elements having substantially the numerical data set forth in the following table:
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |