US2565546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial flow rotary feeder for concrete aggregate
Assignee: Individual
•
Filing: 1947-08-05
•
Granted: 1951-08-28
•
Expires: 1967-08-05
Abstract
No abstract record available.
Inventors
- 👤 Richard R Colburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:26
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4608; B65G53/4625; B65G53/4633; B65G53/4641
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1041548A
Cited
US1096785A
Cited
DE378879C
Cited
US1777043A
Cited
US1953091A
Cited
US1997791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |