US2505023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary beater grinding mill
Assignee: ROBERTS MILL Manufacturing Co
•
Filing: 1944-11-24
•
Granted: 1950-04-25
•
Expires: 1964-11-24
Abstract
No abstract record available.
Inventors
- 👤 John W Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:43
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/26; Y; Y10; Y10S; Y10S241/00; Y10S241/604; Y10S366/00; Y10S366/603
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2287450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |