US2957341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil testing apparatus
Assignee: Individual
•
Filing: 1956-01-16
•
Granted: 1960-10-25
•
Expires: 1976-01-16
Abstract
No abstract record available.
Inventors
- 👤 Menard Louis Francois Auguste
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:24
CPC Classifications
E; E02; E02D; E02D1/00; E02D1/02; E02D1/022; E21; E21B; E21B49/00; E21B49/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |