Patent US2593022A successfully refreshed from Google Patents.
US2593022A
Expired / Lapsed
US
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Concrete reinforcement anchorage
Assignee: Richmond Screw Anchor Co Inc
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Filing: 1948-11-15
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Granted: 1952-04-15
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Expires: 1968-11-15
Abstract
No abstract record available.
Inventors
- 👤 Grivel Armand Charles
- 👤 Alan H Pilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:41
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US799510A
Cited
US1756187A
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US2057328A
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US2133553A
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US2100614A
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US2486527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |