Patent US2990022A successfully refreshed from Google Patents.
US2990022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ram for driving piles and the like
Assignee: Carl Schenck AG
•
Filing: 1958-05-26
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Granted: 1961-06-27
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Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 Muller Ludwig
- 👤 Muller Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:05
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/18; E02D7/26; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18344
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE519802A
Cited
US573404A
Cited
US1569000A
Cited
GB387473A
Cited
US2342243A
Cited
US2507292A
Cited
US2743585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |