Patent US3474279A successfully refreshed from Google Patents.
US3474279A
Expired / Lapsed
US
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Coaxial arc heater with variable arc length
Assignee: Westinghouse Electric Corp
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Filing: 1967-03-22
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Granted: 1969-10-21
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Expires: 1987-03-22
Abstract
No abstract record available.
Inventors
- 👤 George A Kemeny
- 👤 Wayne E Franzen
- 👤 Daniel A Maniero
- 👤 Armin M Bruning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:12
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/106; H; H05; H05B; H05B7/00; H05B7/18; H05B7/185
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) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |