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Patent US2720137A successfully refreshed from Google Patents.
US2720137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linked belt slide projector
Assignee: PICTURE RECORDING Co
•
Filing: 1953-04-06
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Granted: 1955-10-11
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Expires: 1973-04-06
Abstract
No abstract record available.
Inventors
- 👤 George E Musebeck
- 👤 Elmer P Resch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:24
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/12; G03B23/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2704486A
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US1028692A
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US1072861A
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US1226177A
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US1650657A
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US1503488A
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US1590704A
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US2196918A
Cited
US2391879A
Cited
US2563893A
Cited
US2586176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |