Patent US3556500A successfully refreshed from Google Patents.
US3556500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separating metals from comingled scrap metal
Assignee: Huron Valley Steel Corp
•
Filing: 1968-11-18
•
Granted: 1971-01-19
•
Expires: 1988-11-18
Abstract
Abstract Separating a scrap nonferrous and ferrous metal mixture into its constituent components by breaking it into approximately equal size pieces and passing it through a furnace having heating zones, each of a temperature to melt one component, to thereby drain the molten components one at a time, with the ferrous metals remaining as the unmelted residue at the discharge end of the furnace, and using a long, tilted and vibrated furnace tray as the means for supporting, agitating and conveying the metal pieces.
Inventors
- 👤 Leonard Fritz
- 👤 Melvin Wallace
- 👤 John G Seguin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:23
CPC Classifications
C; C22; C22C; C22C3/00; C22B; C22B7/00; C22B7/001; C22B7/004; C22B7/04; C22B9/00; C22B9/10; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
44 words
Apparatus as defined in claim 1, and said tray having a molten metal and furnace heat impervious bottom, except for the respective drains, and being tilted at a slight angle to the horizontal from the feed end to the discharge end of the furnace.
Claim 2
Dependent Claim
29 words
Apparatus as defined in claim 2, and including vibrating means for continuously vibrating the tray for thereby vibrating, agitating and moving the pieces along the length of the tray.
Claim 3
Dependent Claim
39 words
Apparatus as defined in claim 3, and including a grinding means for shredding the scrap metal into approximately equal size pieces before being placed in the furnace; and means for conveying said pieces into the furnace upon the tray.
References Cited (Backward Citations)
US1938239A
Cited
US2041844A
Cited
US2041811A
Cited
US2154673A
Cited
US2703230A
Cited
US2943930A
Cited
US3323908A
Cited
US3484231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |