Patent US2479705A successfully refreshed from Google Patents.
US2479705A
Expired / Lapsed
US
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Power conversion system and apparatus
Assignee: JOSEPH WAITCUS
•
Filing: 1946-08-23
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Granted: 1949-08-23
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Expires: 1966-08-23
Abstract
No abstract record available.
Inventors
- 👤 Edwin S True
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:49
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/19; Y10S320/21
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-22 | 1953-02-21 | 1953-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-22 | 1957-02-21 | 1957-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-22 | 1961-02-21 | 1961-08-23 | $7700.00 | Window Closed / Lapsed |