US2456842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary cutter
Assignee: International Business Machines Corp
•
Filing: 1943-10-13
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Granted: 1948-12-21
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Expires: 1963-10-13
Abstract
No abstract record available.
Inventors
- 👤 Clarence C Rutbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:26
CPC Classifications
B; B23; B23F; B23F21/00; B23F21/12; B23F21/16; B23F21/163; B23F21/166; Y; Y10; Y10T; Y10T407/00; Y10T407/17; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/192
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US45294A
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US1348304A
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US1778260A
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US1849160A
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US1874536A
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US2315147A
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US2273050A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |