Patent US2940152A successfully refreshed from Google Patents.
US2940152A
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US
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Concrete form and chamfer corner strip therefor
Assignee: Superior Concrete Accessories Inc
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Filing: 1956-03-14
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Granted: 1960-06-14
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Expires: 1976-03-14
Abstract
No abstract record available.
Inventors
- 👤 Ernest P Riehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:18
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US883194A
Cited
US1129658A
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US1807315A
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US1846196A
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US1817757A
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US2185860A
Cited
US2389397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |