US2728470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper construction
Assignee: Bristol Industrial Equipment Co
•
Filing: 1951-06-04
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Granted: 1955-12-27
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Expires: 1971-06-04
Abstract
No abstract record available.
Inventors
- 👤 Edward G Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:51
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1570031A
Cited
US1544280A
Cited
US1605070A
Cited
US1726812A
Cited
US1835989A
Cited
US2565663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |