US2896507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for amplifying the light intensity of an optically projected image
Assignee: Gesellschaft zur Foerderung der Forschung an der Eidgenoessischen Technischen Hochschule
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Filing: 1953-04-06
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Granted: 1959-07-28
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Expires: 1973-04-06
Abstract
No abstract record available.
Inventors
- 👤 Mast Fred
- 👤 Baumgartner Willy
- 👤 Held Fritz
- 👤 Baumann Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:32
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/50; G02B27/54; G03; G03G; G03G13/00; G03G15/00; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2164576A
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US2281637A
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US2391451A
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US2600397A
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US2605352A
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US2457981A
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US2510846A
Cited
US2644938A
Cited
US2605335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |