US1912335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controllers for conveyers of granular materials
Assignee: HENRY M BROOKS
•
Filing: 1929-11-29
•
Granted: 1933-05-30
•
Expires: 1949-11-29
Abstract
No abstract record available.
Inventors
- 👤 William M Schweickart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:05
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/0053; B; B65; B65G; B65G47/00; B65G2814/00; B65G2814/03; B65G2814/0344
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) | 1936-05-29 | 1936-11-28 | 1937-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-29 | 1940-11-28 | 1941-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-29 | 1944-11-28 | 1945-05-30 | $7700.00 | Window Closed / Lapsed |