Patent US2547500A successfully refreshed from Google Patents.
US2547500A
Expired / Lapsed
US
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Concrete mixer
Assignee: Individual
•
Filing: 1950-11-16
•
Granted: 1951-04-03
•
Expires: 1970-11-16
Abstract
No abstract record available.
Inventors
- 👤 Robert M Selby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:43
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/42; B28C5/4296; Y; Y10; Y10S; Y10S366/00; Y10S366/606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1332987A
Cited
US1432323A
Cited
US1453323A
Cited
US1577635A
Cited
US2397851A
Cited
US2447071A
Cited
US2482976A
Cited
US2508697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |