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Patent US2827683A successfully refreshed from Google Patents.
US2827683A
Expired / Lapsed
US
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Core assembly for concrete molds
Assignee: Individual
•
Filing: 1955-09-20
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Granted: 1958-03-25
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Expires: 1975-09-20
Abstract
No abstract record available.
Inventors
- 👤 Benart John Richard
- 👤 Donald A Benart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:32
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/16; B28B7/168; B28B7/22; B28B7/28; B28B7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US771303A
Cited
US987134A
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US958402A
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US2138693A
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US2492893A
Cited
US2543892A
Cited
US2578310A
Cited
US2707814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |