US2542584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete block molding machine
Assignee: ACCURATE TOOL AND ENGINEERING
•
Filing: 1947-08-15
•
Granted: 1951-02-20
•
Expires: 1967-08-15
Abstract
No abstract record available.
Inventors
- 👤 Wilbur G Sherman
- 👤 Clinton J Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:19
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/02; B28B3/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1905619A
Cited
US1921003A
Cited
US2029365A
Cited
US2341012A
Cited
US2308132A
Cited
US2407168A
Cited
US2382458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |