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US2758353A
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Means for casting concrete beams
Assignee: CALUMET FLEXICORE Corp
•
Filing: 1953-11-20
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Granted: 1956-08-14
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Expires: 1973-11-20
Abstract
No abstract record available.
Inventors
- 👤 Carl R Carlson
- 👤 Archie R Gagne
- 👤 Eugene M Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:14
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/06; B28B23/00; B28B23/02; B28B23/04; B28B23/06; B28B7/10
Claims Analysis
Total Claims: 0
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US1820892A
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US1925733A
Cited
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Cited
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Cited
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Cited
US2614309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |