Patent US3723290A successfully refreshed from Google Patents.
US3723290A
Expired / Lapsed
US
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High temperature chemical reaction apparatus
Assignee: US Borax Inc
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Filing: 1970-01-07
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Granted: 1973-03-27
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Expires: 1990-01-07
Abstract
Abstract Improvement in plasma generating apparatus in which the plasma-generating zone and downstream reaction zone are cooled by a cooling jacket surrounding the walls of the reaction vessel.
Inventors
- 👤 Kinnon I Mac
- 👤 S Hamblyn
- 👤 A Money
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:08
CPC Classifications
B; B01; B01J; B01J12/00; B01J12/002; H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |