Patent US3346320A successfully refreshed from Google Patents.
US3346320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed varifocal objective
Assignee: Jos Schneider Optische Werke GmbH
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Filing: 1963-07-17
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Granted: 1967-10-10
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Expires: 1983-07-17
Abstract
No abstract record available.
Inventors
- 👤 Karl H Macher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:20
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN AN OPTICAL OBJECTIVE SYSTEM INCLUDING A FIXEDFOCUS REAR LENS GROUP, THE COMBINATION THEREWITH OF A FORWARD LENS GROUP CONSISTING OF A SUBSTANTIALLY FIXED POSITIVE FIRST COMPONENT, A NEGATIVE SECOND COMPONENT, A NEGATIVE THIRD COMPONENT AND A FIXED POSITIVE FOURTH COMPONENT; SAID FIRST COMPONENT INCLUDING THREE AIR-SPACED POSITIVE SINGLETS AND A DISPERSIVE FRONT LENS PRECEDING SAID SINGLETS, SAID FRONT LENS BEING AIR-SPACED FROM THE NEXT ONE OF SAID SINGLETS BY A DISTANCE LESS THAN SUBSTANTIALLY ONE-FOURTH OF THE FOCAL LENGTH OF SAID FIRST COMPONENT, SAID FRONT LENS HAVING AN INDIVIDUAL FOCAL LENGTH WHOSE ABSOLUTE VALUE IS LESS THAN THAT OF THE FOCAL LENGTH OF SAID FIRST COMPONENT; SAID SECOND AND THIRD COMPONENT BEING MOVABLE, RELATIVELY TO EACH OTHER AND TO SAID FIRST AND FOURTH COMPONENTS, INTO A FIRST POSITION IN WHICH THE SYSTEM HAS A RELATIVELY SMALL FOCAL LENGTH, AN INTERMEDIATE SECOND POSITION, AND A THIRD POSITION IN WHICH SAID SYSTEM HAS A RELATIVELY LARGE FOCAL LENGTH, SAID SECOND COMPONENT CONSISTING OF A NEGATIVE SINGLET FOLLOWED BY A NEGATIVE
Claim 2
Dependent Claim
169 words
IN AN OPTICAL OBJECTIVE SYSTEM INCLUDING A FIXEDFOCUS REAR LENS GROUP, THE COMBINATION THEREWITH OF A FORWARD LENS GROUP CONSISTING OF A SUBSTANTIALLY FIXED POSITIVE FIRST COMPONENT, A NEGATIVE SECOND COMPONENT, A NEGATIVE THIRD COMPONENT AND A FIXED POSITIVE FOURTH COMPONENT; SAID FIRST COMPONENT INCLUDING THREE AIR-SPACED POSITIVE SINGLETS AND A DISPERSIVE FRONT LENS PRECEDING SAID SINGLETS, SAID FRONT LENS BEING AIR-SPACED FROM THE NEXT ONE OF SAID SINGLETS BY A DISTANCE LESS THAN SUBSTANTIALLY ONE-FOURTH OF THE FOCAL LENGTH OF SAID FIRST COMPONENT, SAID FRONT LENS HAVING AN INDIVIDUAL FOCAL LENGTH WHOSE ABSOLUTE VALUE IS LESS THAN THAT OF THE FOCAL LENGTH OF SAID FIRST COMPONENT; SAID SECOND AND THIRD COMPONENT BEING MOVABLE, RELATIVELY TO EACH OTHER AND TO SAID FIRST AND FOURTH COMPONENTS, INTO A FIRST POSITION IN WHICH THE SYSTEM HAS A RELATIVELY SMALL FOCAL LENGTH, AN INTERMEDIATE SECOND POSITION, AND A THIRD POSITION IN WHICH SAID SYSTEM HAS A RELATIVELY LARGE FOCAL LENGTH, SAID SECOND COMPONENT CONSISTING OF A NEGATIVE SINGLET FOLLOWED BY A NEGATIVE
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |