US2784644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system attachment of variable focus for camera and projector objectives
Assignee: Mcculloch Motors Corp
•
Filing: 1953-10-26
•
Granted: 1957-03-12
•
Expires: 1973-10-26
Abstract
No abstract record available.
Inventors
- 👤 Felix L Bednarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:57
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/142; G02B15/1421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR578134A
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GB234823A
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FR605884A
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FR612264A
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US1802100A
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FR878741A
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US2582085A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |