US3526096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making rockfill foundations
Assignee: Morrison Knudsen Co Inc
•
Filing: 1968-12-11
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Granted: 1970-09-01
•
Expires: 1988-12-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Frein
- 👤 Arthur Casagrande
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:36
CPC Classifications
E; E02; E02D; E02D27/00; E02D27/32; E02D27/34; E02D15/00; E02D15/10; E02D17/00; E02D17/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |