Patent US3540189A successfully refreshed from Google Patents.
US3540189A
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US
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Process for destroying ammonia contained in waters resulting from the operation of coke ovens
Assignee: Individual
•
Filing: 1968-04-26
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Granted: 1970-11-17
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Expires: 1988-04-26
Abstract
No abstract record available.
Inventors
- 👤 Hermann Siewers
- 👤 Karlheinz Flasche
- 👤 Alfred Stetter
- 👤 Siegfried Pfeiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:41
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/04; C01B3/047; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1880841A
Cited
US2070620A
Cited
US2884304A
Cited
GB804544A
Cited
US3292345A
Cited
US3451896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |