Patent US1903304A successfully refreshed from Google Patents.
US1903304A
Expired / Lapsed
US
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Feeding hopper for pneumatic conveyers
Assignee: Individual
•
Filing: 1929-11-14
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Granted: 1933-04-04
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Expires: 1949-11-14
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Wenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:49
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4608; B65G53/4625; B65G53/4633
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-04-03 | 1936-10-03 | 1937-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-03 | 1940-10-03 | 1941-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-03 | 1944-10-03 | 1945-04-04 | $7700.00 | Window Closed / Lapsed |