US2593007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide feeding mechanism for still picture projection machines
Assignee: Individual
•
Filing: 1949-02-09
•
Granted: 1952-04-15
•
Expires: 1969-02-09
Abstract
No abstract record available.
Inventors
- 👤 Cadwell Clarence John
- 👤 Frank M Adamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:09
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US590903A
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US720099A
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US1247608A
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US1165318A
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US1443711A
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US2363820A
Cited
CH219446A
Cited
US2427164A
Cited
US2503239A
Cited
US2412246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |