US2504731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic ore sorting
Assignee: Huntington Alloys Corp
•
Filing: 1946-04-25
•
Granted: 1950-04-18
•
Expires: 1966-04-25
Abstract
No abstract record available.
Inventors
- 👤 Rose Ernest Herbert
- 👤 Prince Arthur Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:50
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/34; B07C5/344; B07C2501/00; B07C2501/0036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB284307A
Cited
GB302725A
Cited
GB312684A
Cited
US2045769A
Cited
US1992100A
Cited
US2124577A
Cited
US2102452A
Cited
US2237254A
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US2353211A
Cited
US2432390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |