US2568332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device controlling flow of material into a hopper, responsive to material level in said hopper
Assignee: NAT PLASTIC PRODUCTS Co
•
Filing: 1946-04-15
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Granted: 1951-09-18
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Expires: 1966-04-15
Abstract
No abstract record available.
Inventors
- 👤 Genovese Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/288; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/60; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US434702A
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US2301136A
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US2466386A
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US1398790A
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US1489938A
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US2276382A
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US2381505A
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US2381802A
Cited
US2408221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |