US2452982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submerged reciprocating screen
Assignee: JEFFREY Co
•
Filing: 1945-06-25
•
Granted: 1948-11-02
•
Expires: 1965-06-25
Abstract
No abstract record available.
Inventors
- 👤 Byron M Bird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:47
CPC Classifications
B; B07; B07B; B07B1/00; B07B2230/00; B07B2230/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US245340A
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US803550A
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US1054799A
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US1070552A
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US2137753A
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US2267327A
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US2319901A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |