US3143590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zoom lens
Assignee: Nikon Corp
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Filing: 1962-02-14
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Granted: 1964-08-04
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Expires: 1982-02-14
Abstract
No abstract record available.
Inventors
- 👤 Higuchi Takashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:03
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/142; G02B15/1425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A ZOOM LENS CONSISTING OF A FIRST GROUP OF NEGATIVE LENSES HAVING A FOCAL LENGTH OF F1 AND A SECOND GROUP OF POSITIVE LENSES HAVING A FOCAL LENGTH OF F2 SATISFYING THE RELATIONS
Claim 2
Dependent Claim
33 words
A ZOOM LENS CONSISTING OF A FIRST GROUP OF NEGATIVE LENSES HAVING A FOCAL LENGTH OF F1 AND A SECOND GROUP OF POSITIVE LENSES HAVING A FOCAL LENGTH OF F2 SATISFYING THE RELATIONS
References Cited (Backward Citations)
FR1259007A
Cited
US3064533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |