US2671941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Form for casting concrete building blocks
Assignee: Individual
•
Filing: 1952-03-03
•
Granted: 1954-03-16
•
Expires: 1972-03-03
Abstract
No abstract record available.
Inventors
- 👤 Emil L Fabian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:39
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/0029; B28B7/0032
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US296825A
Cited
US1604034A
Cited
US2037545A
Cited
US2181959A
Cited
US2416559A
Cited
US2583626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |