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US3838017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerator for coke ovens
Assignee: Dr C Otto and Co GmbH
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Filing: 1972-09-19
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Granted: 1974-09-24
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Expires: 1992-09-19
Abstract
Abstract A vertical regenerator for a horizontal coke oven chamber. Columns of superimposed checkerbricks are arranged so that each brick extends longitudinally between spaced parallel walls of the regenerator. Along the longitudinal length of each checkerbrick, there extends a projection which passes into a complementary formed recess in a vertically adjacent brick.
Inventors
- 👤 O Messerschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:07
CPC Classifications
C; C10; C10B; C10B29/00; C10B29/02
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |