Patent US3403546A successfully refreshed from Google Patents.
US3403546A
Expired / Lapsed
US
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Slump indicator for concrete
Assignee: CLEO C STRATTON
•
Filing: 1965-08-18
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Granted: 1968-10-01
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Expires: 1985-08-18
Abstract
No abstract record available.
Inventors
- 👤 Cleo C Stratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:19
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1168925A
Cited
US1882932A
Cited
US2547926A
Cited
US2700302A
Cited
US2935368A
Cited
US3237437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |