US2478857A
Expired / Lapsed
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Radio-frequency heating
Assignee: RCA Corp
•
Filing: 1945-12-22
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Granted: 1949-08-09
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Expires: 1965-12-22
Abstract
No abstract record available.
Inventors
- 👤 George H Brown
- 👤 Rudolph A Bierwirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:54
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C65/00; B29C65/02; B29C65/04; B29C65/48; B29C65/4855; B29C65/78; B29C66/20; B29C66/21; B29C66/40; B29C66/41; B29C66/43; B29C66/45; B29C66/80; B29C66/84; B29C66/861; Y; Y10; Y10T; Y10T156/00; Y10T156/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |