US2679382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill
Assignee: Hemscheidt Hermann Maschinenfabrik GmbH and Co
•
Filing: 1950-12-19
•
Granted: 1954-05-25
•
Expires: 1970-12-19
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Adalbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:38
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/36; E21B10/38; E21B10/003; E21B10/46; E21B10/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US237013A
Cited
US1169369A
Cited
GB288831A
Cited
US1887373A
Cited
DE685529C
Cited
US2294004A
Cited
US2507221A
Cited
US2519861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |