US3208735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile concrete mixers
Assignee: Individual
•
Filing: 1961-08-16
•
Granted: 1965-09-28
•
Expires: 1981-08-16
Abstract
No abstract record available.
Inventors
- 👤 Wolff Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:27
CPC Classifications
B; B28; B28C; B28C9/00; B28C9/04; B28C9/0409; B28C5/00; B28C5/08; B28C5/18; B28C5/26; B28C5/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
A MOBILE CONCRETE MIXER COMPRISING A FRAME, A CIRCULAR SECTION MIXING DRUM MOUNTED ON SAID FRAME AND HAVING A SUBSTANTIALLY VERTICALLY AXIS AND AN OUTER WALL, A TUBULAR MEMBER CONCENTRICALLY DISPOSED WITHIN SAID DRUM FOR DEFINING AN ANNULAR MIXING SPACE, AT LEAST TWO STATIONARY MIXING DEVICES DISPOSED WITHIN SAID ANNULAR SPACE AND BEING POSITIONED ALONG THE OUTER WALL OF SAID DRUM, A VERTICALLY EXTENDING BEARING COLUMN ASSOCIATED WITH EACH OF SAID MIXING DEVICES AND BEING DISPOSED EXTERNALLY OF SAID DRUM, MEANS FOR CONNECTING EACH OF SAID MIXING DEVICES TO ITS ASSOCIATED BEARING COLUMN FOR PIVOTAL DISPLACEMENT ABOUT SAID COLUMN, SAID MEANS FOR ROTATING SAID DRUM ABOUT SAID AXIS AT A SPEED SUFFICIENT FOR MOVING CONCRETE MIX TOWARD SAID OUTER WALL UNDER THE ACTION OF CENTRIFUGAL FORCE WHEREBY THE CONCRETE MIX IS CAUGHT AND MIXED BY SAID MIXING DEVICES.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |