US1730893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for determining the consistency of concrete
Assignee: Koehring Co
•
Filing: 1926-07-07
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Granted: 1929-10-08
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Expires: 1946-07-07
Abstract
No abstract record available.
Inventors
- 👤 Erich H Lichtenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:31
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/02; B28C7/022; G; G01; G01N; G01N11/00; G01N11/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-10-07 | 1933-04-08 | 1933-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-10-07 | 1937-04-08 | 1937-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-10-07 | 1941-04-08 | 1941-10-08 | $7700.00 | Window Closed / Lapsed |