Patent US2804295A successfully refreshed from Google Patents.
US2804295A
Expired / Lapsed
US
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Apparatus for preheating and conditioning scrap metal
Assignee: Individual
•
Filing: 1952-09-19
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Granted: 1957-08-27
•
Expires: 1972-09-19
Abstract
No abstract record available.
Inventors
- 👤 Frank W Brooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:11
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/562; C21C5/565; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S266/00; Y10S266/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US105267A
Cited
US499188A
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US975751A
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US1126028A
Cited
US1526400A
Cited
US1708509A
Cited
GB520670A
Cited
US2296380A
Cited
US2338617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |