US3452239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-electrode arc heaters
Assignee: Westinghouse Electric Corp
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Filing: 1966-12-05
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Granted: 1969-06-24
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Expires: 1986-12-05
Abstract
No abstract record available.
Inventors
- 👤 Charles B Wolf
- 👤 George A Kemeny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:19
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/40; H05B; H05B7/00; H05B7/18; H05B7/185; H05H1/3431
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) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |