US3399737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elongated object adapted to be driven into a resistant medium such as soil and a method for facilitating the driving in of such an object
Assignee: STICHTING WATERBOUWKUNDIG LABORATORIUM
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Filing: 1966-06-21
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Granted: 1968-09-03
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Expires: 1986-06-21
Abstract
No abstract record available.
Inventors
- 👤 Begemann Heinrich Karl Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:15
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/26; E02D1/00; E02D1/02; E02D1/022; E02D1/025; E21; E21B; E21B25/00; E21B25/06
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |