US2618385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening device
Assignee: Ogden Iron Works Co
•
Filing: 1950-06-28
•
Granted: 1952-11-18
•
Expires: 1970-06-28
Abstract
No abstract record available.
Inventors
- 👤 James W Silver
- 👤 Joseph M Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:42
CPC Classifications
B; B07; B07B; B07B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US436049A
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US483225A
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US527656A
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US530261A
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US575376A
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DE600345C
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US712051A
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US1387562A
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US1641777A
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US1766340A
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US1899292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |