US2495035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Schmidt projector having cathoderay tube comprising spherical mirror
Assignee: Rauland Borg Corp
•
Filing: 1942-05-13
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Granted: 1950-01-17
•
Expires: 1962-05-13
Abstract
No abstract record available.
Inventors
- 👤 Constantin S Szegho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:58
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/08; G02B17/0884; G02B17/0888; H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/894
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB443788A
Cited
US2166399A
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GB487241A
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GB463891A
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US2229302A
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US2274116A
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US2276360A
Cited
US2292979A
Cited
US2295779A
Cited
US2298808A
Cited
US2305855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |