Patent US2470285A successfully refreshed from Google Patents.
US2470285A
Expired / Lapsed
US
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Radio frequency apparatus for heating metallic articles of large surface area to volume ratio
Assignee: RCA Corp
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Filing: 1944-03-30
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Granted: 1949-05-17
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Expires: 1964-03-30
Abstract
No abstract record available.
Inventors
- 👤 Rudolph A Bierwirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:40
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1826207A
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US1878458A
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US2178201A
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US2186626A
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US2182799A
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US2361517A
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US2320572A
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US2414362A
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US2342532A
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GB557763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |