Patent US2477959A successfully refreshed from Google Patents.
US2477959A
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Balanced heat system for vacuum drying
Assignee: Worthington Pump and Machinery Corp
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Filing: 1944-10-03
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Granted: 1949-08-02
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Expires: 1964-10-03
Abstract
No abstract record available.
Inventors
- 👤 Brown Joseph Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:40
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/28; F26B17/284; F26B21/00; F26B21/30; F26B21/33; F26B21/333; F26B23/00; F26B23/001; F26B23/002; F26B23/005; F26B5/00; F26B5/04; F26B5/045; F26B7/00; Y; Y02; Y02B; Y02B30/00; Y02B30/52; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S159/00; Y10S159/05
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) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |