Patent US3377119A successfully refreshed from Google Patents.
US3377119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanically compensated zoom lens system
Assignee: Canon Inc
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Filing: 1963-12-30
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Granted: 1968-04-09
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Expires: 1983-12-30
Abstract
No abstract record available.
Inventors
- 👤 Takano Eiichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:14
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/145; G02B15/1451; G02B15/145125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
ZOOM LENS SYSTEM COMPRISING A COMPONENT I OF POSITIVE REFRACTIVE POWER CONSISTING OF A CEMENTED POSITIVE DOUBLET AND A SPACED SINGLE POSITIVE MENISCUS WITH ITS CONVEX SURFACE TOWARD THE OBJECT, A COMPONENT II OF NEGATIVE REFRACTIVE POWER CONSISTING OF A SINGLE NEGATIVE MENISCUS WITH ITS STRONG CONCAVE SURFACE TOWARD THE IMAGE AND A SPACED CEMENTED NEGATIVE DOUBLET, A COMPONENT III CONSISTING OF A CEMENTED NEGATIVE DOUBLET WITH ITS CONCAVE SURFACE TOWARD THE OBJECT, A COMPONENT IV OF POSITIVE REFRACTIVE POWER CONSISTING OF A CEMENTED POSITIVE DOUBLET AND A SPACED THICK NEGATIVE MENISCUS WITH ITS STRONG CONCAVE SURFACE TOWARD THE IMAGE, AND A COMPONENT V OF POSITIVE REFRACTIVE POWER CONSISTING OF A CEMENTED POSITIVE DOUBLET AND A SPACED CEMENTED NEGATIVE MENISCUS DOUBLET WITH ITS CONCAVE SURFACE TOWARD THE IMAGE, THE COMPONENT II BEING MOVABLE IN ONE DIRECTION
Claim 2
Dependent Claim
136 words
ZOOM LENS SYSTEM COMPRISING A COMPONENT I OF POSITIVE REFRACTIVE POWER CONSISTING OF A CEMENTED POSITIVE DOUBLET AND A SPACED SINGLE POSITIVE MENISCUS WITH ITS CONVEX SURFACE TOWARD THE OBJECT, A COMPONENT II OF NEGATIVE REFRACTIVE POWER CONSISTING OF A SINGLE NEGATIVE MENISCUS WITH ITS STRONG CONCAVE SURFACE TOWARD THE IMAGE AND A SPACED CEMENTED NEGATIVE DOUBLET, A COMPONENT III CONSISTING OF A CEMENTED NEGATIVE DOUBLET WITH ITS CONCAVE SURFACE TOWARD THE OBJECT, A COMPONENT IV OF POSITIVE REFRACTIVE POWER CONSISTING OF A CEMENTED POSITIVE DOUBLET AND A SPACED THICK NEGATIVE MENISCUS WITH ITS STRONG CONCAVE SURFACE TOWARD THE IMAGE, AND A COMPONENT V OF POSITIVE REFRACTIVE POWER CONSISTING OF A CEMENTED POSITIVE DOUBLET AND A SPACED CEMENTED NEGATIVE MENISCUS DOUBLET WITH ITS CONCAVE SURFACE TOWARD THE IMAGE, THE COMPONENT II BEING MOVABLE IN ONE DIRECTION
References Cited (Backward Citations)
US2847907A
Cited
US3074318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |