Patent US2863356A successfully refreshed from Google Patents.
US2863356A
Expired / Lapsed
US
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Shiftable film bed and optical system for projectors
Assignee: Individual
•
Filing: 1951-08-30
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Granted: 1958-12-09
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Expires: 1971-08-30
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:00
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/132; Y; Y10; Y10S; Y10S353/00; Y10S353/03; Y10S353/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1857135A
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US1765453A
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US2052298A
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US1919922A
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US2330799A
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US2417446A
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US2564057A
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US2529664A
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US2496647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |