US2439987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture projector and viewer
Assignee: FLOOR O MATIC Inc
•
Filing: 1946-12-11
•
Granted: 1948-04-20
•
Expires: 1966-12-11
Abstract
No abstract record available.
Inventors
- 👤 Roger Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:33
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)
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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) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |