Patent US2731699A successfully refreshed from Google Patents.
US2731699A
Expired / Lapsed
US
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Apparatus for making concrete products
Assignee: CARBON P DUBBS
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Filing: 1950-04-21
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Granted: 1956-01-24
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Expires: 1970-04-21
Abstract
No abstract record available.
Inventors
- 👤 Carbon C Dubbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:37
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/40; B28B7/46; B28B1/00; B28B1/24; B28B7/28; B28B7/30; B28B7/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1552064A
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US1492642A
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US2177221A
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US2313110A
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US2311358A
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US2542874A
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US2427044A
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US2474721A
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US2628402A
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US2612673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |