Patent US2569085A successfully refreshed from Google Patents.
US2569085A
Expired / Lapsed
US
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Hopper, with valve closure having vibrator therein, for sand and other divided material
Assignee: Individual
•
Filing: 1945-08-11
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Granted: 1951-09-25
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Expires: 1965-08-11
Abstract
No abstract record available.
Inventors
- 👤 Wood David Howard
- 👤 Roe Herbert James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:02
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/14; B65; B65D; B65D88/00; B65D88/26; B65D88/28; B65D88/54; B65D88/64; B65D88/66; B65D90/00; B65D90/54; B65D90/62; B65D90/626
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |