US2783680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide and film projector with swing-away head
Assignee: Individual
•
Filing: 1951-01-29
•
Granted: 1957-03-05
•
Expires: 1971-01-29
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:53
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1956418A
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US2243160A
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US2174660A
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US2204884A
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US2251077A
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US2330709A
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US2303633A
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US2285915A
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US2512314A
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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) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |