US2534084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection apparatus
Assignee: BRADFIELD AND BIDWELL Inc
•
Filing: 1946-06-21
•
Granted: 1950-12-12
•
Expires: 1966-06-21
Abstract
No abstract record available.
Inventors
- 👤 Broek Jan A Van Den
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:42
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/111
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1919595A
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US1966531A
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US2128868A
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US2113578A
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US2177638A
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US2160890A
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US2246412A
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US2294219A
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US2281988A
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US2344263A
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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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |