US2649404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coke-oven by-product recovery
Assignee: United Engineers and Constructors Inc
•
Filing: 1950-09-26
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Granted: 1953-08-18
•
Expires: 1970-09-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:52
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/16; C10K1/18; C10K1/085; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE RECOVERY OF BY-PRODUCTS FROM HOT COKE OVEN GASES COMPRISING IN COMBINATION THE STEPS OF CONTACTING SAID GASES WITH A SUBSTANTIALLY NAPHTHALENE-FREE ABSORBER OIL HAVING AN INITIAL POINT ABOVE ABOUT 225* C. AND AN END POINT NOT HIGHER THAN ABOUT 400* C. FOR REMOVAL OF NAPHTHALENE THEREFROM WITH CONSEQUENT ENRICHMENT OF SAID ABSORBER OIL, AND FRACTIONATING AT LEAST A PORTION OF SAID NAPTHALENE-RICH ABSORBER OIL IN THE PRESENCE OF A HEAVY CARRIER HAVING AN END POINT ABOVE THE END POINT OF THE ABSORBER OIL AT LEAST A PORTION OF WHICH CARRIER
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE RECOVERY OF BY-PRODUCTS FROM HOT COKE OVEN GASES COMPRISING IN COMBINATION THE STEPS OF CONTACTING SAID GASES WITH A SUBSTANTIALLY NAPHTHALENE-FREE ABSORBER OIL HAVING AN INITIAL POINT ABOVE ABOUT 225* C. AND AN END POINT NOT HIGHER THAN ABOUT 400* C. FOR REMOVAL OF NAPHTHALENE THEREFROM WITH CONSEQUENT ENRICHMENT OF SAID ABSORBER OIL, AND FRACTIONATING AT LEAST A PORTION OF SAID NAPTHALENE-RICH ABSORBER OIL IN THE PRESENCE OF A HEAVY CARRIER HAVING AN END POINT ABOVE THE END POINT OF THE ABSORBER OIL AT LEAST A PORTION OF WHICH CARRIER
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |