US2685986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrating hopper apparatus
Assignee: BEAUMONT BIRCH CO
•
Filing: 1949-02-01
•
Granted: 1954-08-10
•
Expires: 1969-02-01
Abstract
No abstract record available.
Inventors
- 👤 John H Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:38
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/54; B65D88/64; B65D88/66; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18544; Y10T74/18552
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US830309A
Cited
US1942581A
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US2246497A
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US2209143A
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US2446750A
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US2497024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |