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Patent US2768279A successfully refreshed from Google Patents.
US2768279A
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US
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Electric arc torch apparatus
Assignee: Individual
•
Filing: 1955-01-18
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Granted: 1956-10-23
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Expires: 1975-01-18
Abstract
No abstract record available.
Inventors
- 👤 William A Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:39
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/16; B05B7/22; B05B7/222; B05B7/226
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1002721A
Cited
US1638336A
Cited
US1616145A
Cited
US2003167A
Cited
US2052796A
Cited
DE664523C
Cited
US2308510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |