Patent US2751815A successfully refreshed from Google Patents.
US2751815A
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US
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Strip film projection apparatus
Assignee: DU KANE CORP
•
Filing: 1952-06-03
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Granted: 1956-06-26
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Expires: 1972-06-03
Abstract
No abstract record available.
Inventors
- 👤 Robert H Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:33
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/12; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18528
Claims Analysis
Total Claims: 0
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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) | 1959-06-26 | 1959-12-26 | 1960-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-26 | 1963-12-26 | 1964-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-26 | 1967-12-26 | 1968-06-26 | $7700.00 | Window Closed / Lapsed |