Patent US2620541A successfully refreshed from Google Patents.
US2620541A
Expired / Lapsed
US
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Machine for molding concrete blocks
Assignee: Individual
•
Filing: 1949-11-25
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Granted: 1952-12-09
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Davies Miles
- 👤 Neth Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:58
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/02; B28B3/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |