US2639780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chaff separator and furnace
Assignee: Individual
•
Filing: 1950-02-14
•
Granted: 1953-05-26
•
Expires: 1970-02-14
Abstract
No abstract record available.
Inventors
- 👤 Gordon W Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:17
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/02; F23J15/022; F23J15/025; B; B01; B01D; B01D46/00; B01D46/10; B01D46/18; B01D46/66; B01D46/68; B01D46/681; F23J2217/00; F23J2217/30; Y; Y10; Y10S; Y10S55/00; Y10S55/10
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) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |