US2598573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual stereoscopic projector
Assignee: Individual
•
Filing: 1949-12-05
•
Granted: 1952-05-27
•
Expires: 1969-12-05
Abstract
No abstract record available.
Inventors
- 👤 Harold R Lutes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:01
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/18; G03B35/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR344289A
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FR451311A
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US1221091A
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US1259365A
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FR519824A
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FR22938E
Cited
US1498177A
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US1550214A
Cited
US1808176A
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US1787808A
Cited
FR689780A
Cited
US1971234A
Cited
US2307981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |