Patent US3920805A successfully refreshed from Google Patents.
US2646494A
Expired / Lapsed
US
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Unit for cutting materials by heat
Assignee: GEORGE B HART Inc
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Filing: 1950-06-21
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Granted: 1953-07-21
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Expires: 1970-06-21
Abstract
No abstract record available.
Inventors
- 👤 Robert W Fegan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:59
CPC Classifications
B; B26; B26F; B26F3/00; B26F3/06; B26F3/08; B26F3/12; Y; Y10; Y10T; Y10T83/00; Y10T83/283; Y10T83/293
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |