US2705437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magazine type slide projector
Assignee: DE VRY Corp
•
Filing: 1952-07-01
•
Granted: 1955-04-05
•
Expires: 1972-07-01
Abstract
No abstract record available.
Inventors
- 👤 Lessman Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:36
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/04; G03B23/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1002078A
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US1093401A
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US1967161A
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US1966531A
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US2029871A
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US2213779A
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US2298322A
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US2286322A
Cited
US2362601A
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US2401506A
Cited
US2564057A
Cited
US2533441A
Cited
US2583442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-04 | 1958-10-04 | 1959-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-04 | 1962-10-04 | 1963-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-04 | 1966-10-04 | 1967-04-05 | $7700.00 | Window Closed / Lapsed |