Patent US3045546A successfully refreshed from Google Patents.
US3045546A
Expired / Lapsed
US
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Optical objectives of variable focal length
Assignee: Taylor Taylor and Hobson Ltd
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Filing: 1958-09-29
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Granted: 1962-07-24
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Expires: 1978-09-29
Abstract
No abstract record available.
Inventors
- 👤 Cook Gordon Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:52
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/143; G02B15/1431; G02B15/143105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB381662A
Cited
US2165341A
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FR856897A
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US2649025A
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US2741155A
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US2746350A
Cited
FR1080099A
Cited
US2847907A
Cited
US2844996A
Cited
US2843016A
Cited
US2937572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |