US3512029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual exhaust three-phase alternating current arc heater for chemical processing
Assignee: Westinghouse Electric Corp
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Filing: 1967-04-14
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Granted: 1970-05-12
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Expires: 1987-04-14
Abstract
No abstract record available.
Inventors
- 👤 Peter F Kienast
- 👤 Daniel A Maniero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:36
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; 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) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |