US2758543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting method and apparatus
Assignee: Individual
•
Filing: 1950-04-10
•
Granted: 1956-08-14
•
Expires: 1970-04-10
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Grandin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:41
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/08; E; E21; E21B; E21B29/00; E21B29/02; E21B29/06; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0591
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2399211A
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US2415814A
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US2494256A
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US2440568A
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US2543057A
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US2587243A
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US2506836A
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US2638323A
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US2513233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |