Patent DE1163008B successfully refreshed from Google Patents.
US2415121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill grinder
Assignee: Rockwell Manufacturing Co
•
Filing: 1943-03-10
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Granted: 1947-02-04
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Expires: 1963-03-10
Abstract
No abstract record available.
Inventors
- 👤 Christy A Wiken
- 👤 Hugo V Boehnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:26
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/26; B24B3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US563593A
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US887059A
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US978851A
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US1391034A
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US1832684A
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US2024268A
Cited
US2142923A
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US2275496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |