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US2492502A
Expired / Lapsed
US
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Concrete construction form
Assignee: Individual
•
Filing: 1946-03-25
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Granted: 1949-12-27
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Expires: 1966-03-25
Abstract
No abstract record available.
Inventors
- 👤 Joel V Salmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:28
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1199077A
Cited
US1565845A
Cited
GB203088A
Cited
US1539655A
Cited
US1704898A
Cited
US1694292A
Cited
US1784329A
Cited
US2400852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |