Patent US2879890A successfully refreshed from Google Patents.
US2879890A
Expired / Lapsed
US
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Ore-screening and grading machine
Assignee: Individual
•
Filing: 1956-12-31
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Granted: 1959-03-31
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Romera Manuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:41
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/34; B07B1/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US144836A
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US564179A
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US616271A
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US639906A
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US820434A
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US1348770A
Cited
GB269877A
Cited
US2253296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |