US2420168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Achromatic light reflecting and transmitting film
Assignee: RCA Corp
•
Filing: 1943-12-23
•
Granted: 1947-05-06
•
Expires: 1963-12-23
Abstract
No abstract record available.
Inventors
- 👤 Glenn L Dimmick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/285; G02B5/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1425967A
Cited
US2220861A
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US2207656A
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US2281474A
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US2252770A
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US2289054A
Cited
US2349457A
Cited
US2366687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |