Patent US2490370A successfully refreshed from Google Patents.
US2490370A
Expired / Lapsed
US
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Means for transmitting and radiating light rays emitted from a source of light
Assignee: Testrite Instrument Co Inc
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Filing: 1946-09-12
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Granted: 1949-12-06
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Expires: 1966-09-12
Abstract
No abstract record available.
Inventors
- 👤 Neuwirth Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:41
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/54; G03B27/545
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2124089A
Cited
US1760253A
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US1880414A
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US1935729A
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US2001378A
Cited
US2216993A
Cited
US2186143A
Cited
US2404627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |