US1897490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic concrete aggregate proportioning apparatus
Assignee: ROADS CONSTRUCTION Co Ltd
•
Filing: 1930-05-17
•
Granted: 1933-02-14
•
Expires: 1950-05-17
Abstract
No abstract record available.
Inventors
- 👤 Noble Bert
- 👤 Robert J Noble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:14
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/04; B28C7/0404; B28C7/0418; Y; Y10; Y10S; Y10S177/00; Y10S177/07; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339; Y10T137/7355; Y10T137/8593; Y10T137/86389; Y10T137/86445
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1936-02-14 | 1936-08-15 | 1937-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-14 | 1940-08-15 | 1941-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-14 | 1944-08-15 | 1945-02-14 | $7700.00 | Window Closed / Lapsed |