US2570652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture disk viewing projector
Assignee: Individual
•
Filing: 1949-05-04
•
Granted: 1951-10-09
•
Expires: 1969-05-04
Abstract
No abstract record available.
Inventors
- 👤 James J Dilks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:35
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/10; G03B23/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1210316A
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US1381849A
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US1537654A
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US1680619A
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US1620768A
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US2128409A
Cited
US2186753A
Cited
US2311056A
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US2374981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |