US3030087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrating plowing tool
Assignee: Gewerkschaft Eisenhutte Westfalia GmbH
•
Filing: 1958-07-09
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Granted: 1962-04-17
•
Expires: 1978-07-09
Abstract
No abstract record available.
Inventors
- 👤 Herrmann Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:46
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US719675A
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US956618A
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US2093930A
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US2145655A
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DE890490C
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FR923596A
Cited
US2691514A
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US2702697A
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US2610841A
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FR1094480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |