US2547403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material mixing apparatus
Assignee: Individual
•
Filing: 1947-07-05
•
Granted: 1951-04-03
•
Expires: 1967-07-05
Abstract
No abstract record available.
Inventors
- 👤 Walter M Madsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:04
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1059; E01C19/1068; E01C19/1013; E01C19/104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US808599A
Cited
US1750264A
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US1788345A
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US1884423A
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US1987243A
Cited
US2206060A
Cited
US2256422A
Cited
US2276237A
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 |