US2581449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed machining of ferrous materials
Assignee: Lasalle Steel Co
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Filing: 1950-06-30
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Granted: 1952-01-08
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Expires: 1970-06-30
Abstract
No abstract record available.
Inventors
- 👤 Theodore S See
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:06
CPC Classifications
B; B23; B23C; B23C1/00; Y; Y10; Y10T; Y10T407/00; Y10T407/27; Y10T409/00; Y10T409/30; Y10T409/300056; Y10T409/300112
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1492347A
Cited
US2213251A
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US2215007A
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US2278738A
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US2350974A
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US2497023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |