US2541981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete block packing machine
Assignee: BEN R SMUTEK
•
Filing: 1948-09-17
•
Granted: 1951-02-20
•
Expires: 1968-09-17
Abstract
No abstract record available.
Inventors
- 👤 Zebe A Babcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:28
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/08; B28B1/093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US610524A
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US1706121A
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US2453970A
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US2421016A
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US2444426A
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US2444452A
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US2415359A
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US2414992A
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US2541982A
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 |