US3021189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of coke oven gas
Assignee: Bethlehem Steel Corp
•
Filing: 1958-10-02
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Granted: 1962-02-13
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Expires: 1978-10-02
Abstract
No abstract record available.
Inventors
- 👤 Edgar B Mancke
- 👤 Joseph E Schmuk
- 👤 Frank M Temmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:12
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/105; C10K1/106; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
IN A CONTINUOUS PROCESS, THE METHOD OF REMOVING AMMONIA AND ACIDIC GASES FROM COKE OVEN GAS WHICH COMPRISES TREATING A PORTION OF SAID GAS WITH SULFATE LIQUOR OF LOW PH CONTAINING SULFURIC ACID AND FERROUS SULFATE AND CONTINUING THE TREATMENT UNTIL THE PH OF
Claim 2
Dependent Claim
44 words
IN A CONTINUOUS PROCESS, THE METHOD OF REMOVING AMMONIA AND ACIDIC GASES FROM COKE OVEN GAS WHICH COMPRISES TREATING A PORTION OF SAID GAS WITH SULFATE LIQUOR OF LOW PH CONTAINING SULFURIC ACID AND FERROUS SULFATE AND CONTINUING THE TREATMENT UNTIL THE PH OF
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) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |