Patent US2541734A successfully refreshed from Google Patents.
US2541734A
Expired / Lapsed
US
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Method of molding concrete blocks
Assignee: Individual
•
Filing: 1945-11-14
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Granted: 1951-02-13
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Expires: 1965-11-14
Abstract
No abstract record available.
Inventors
- 👤 Charles W Akers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:16
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/08; B28B1/087; B28B1/0873
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1004327A
Cited
US1000089A
Cited
US2106329A
Cited
US2054253A
Cited
US2298074A
Cited
US2313716A
Cited
US2397695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |