Patent US3490577A successfully refreshed from Google Patents.
US3490577A
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Concrete cylinder mold and method of conditioning same
Assignee: HENRY W GRIKSCHEIT
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Filing: 1967-05-12
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Granted: 1970-01-20
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Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 Henry W Grikscheit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:19
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/02; B65D81/022; B65D75/00; B65D75/52; B65D75/58; B65D75/5827; B65D75/5833; B65D75/5844; Y; Y10; Y10S; Y10S249/00; Y10S249/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2695847A
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US2914377A
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US3077979A
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US3163908A
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US3120319A
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US3189243A
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US3276666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |