US2583159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill grinding apparatus
Assignee: Individual
•
Filing: 1948-10-08
•
Granted: 1952-01-22
•
Expires: 1968-10-08
Abstract
No abstract record available.
Inventors
- 👤 Nels H Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US428426A
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US497095A
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US751198A
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USRE20491E
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US641107A
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US643703A
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US730808A
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US2411609A
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US2401471A
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US2384899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |