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US3069972A
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US
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Optical system for zoom binoculars
Assignee: Revere Camera Co
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Filing: 1961-01-25
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Granted: 1962-12-25
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Expires: 1981-01-25
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Tibbetts
- 👤 David C Gilkeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:25
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/02; G02B15/04; G02B15/14; G02B15/143; G02B15/1431; G02B15/143105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2741947A
Cited
US2988955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |