US2643542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the consistency of concrete mix
Assignee: Worthington Corp
•
Filing: 1947-09-06
•
Granted: 1953-06-30
•
Expires: 1967-09-06
Abstract
No abstract record available.
Inventors
- 👤 George W Cronk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
G; G01; G01N; G01N11/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1449458A
Cited
US1937077A
Cited
US2089604A
Cited
US2354634A
Cited
US2361460A
Cited
US2440611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |