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Patent US3277551A successfully refreshed from Google Patents.
US3277551A
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Concrete block molding machines
Assignee: Sekiguchi Seisakusho KK
•
Filing: 1963-10-07
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Granted: 1966-10-11
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Expires: 1983-10-07
Abstract
No abstract record available.
Inventors
- 👤 Sekiguchi Hidco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:13
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/02; B28B3/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1905975A
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US2366780A
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US2298074A
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US2496016A
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US2615228A
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US2706322A
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US2961730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |