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US2643721A
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Assignee: RADIO TELEVISION INST Inc
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Filing: 1947-03-06
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Granted: 1953-06-30
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Expires: 1967-03-06
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Arbuckle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:12
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/34; B21D28/343; Y; Y10; Y10S; Y10S411/00; Y10S411/918; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2122; Y10T83/869; Y10T83/8821
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US928256A
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US945799A
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US980478A
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US1697602A
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FR796095A
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US2064091A
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US2096778A
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US2176943A
Cited
US2197220A
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US2434844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |