US2774240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil testing apparatus
Assignee: AG fur GRUNDWASSERBAUTEN
•
Filing: 1952-04-01
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Granted: 1956-12-18
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Expires: 1972-04-01
Abstract
No abstract record available.
Inventors
- 👤 Fehlmann Hans Beat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:12
CPC Classifications
E; E02; E02D; E02D1/00; E02D1/02; E02D1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL43095C
Cited
DE508711C
Cited
GB504625A
Cited
US2280592A
Cited
US2472120A
Cited
FR974680A
Cited
FR985203A
Cited
FR993278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |