Patent US1378381A successfully refreshed from Google Patents.
Patent US4525023A successfully refreshed from Google Patents.
Patent US2697067A successfully refreshed from Google Patents.
US2697067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for coke oven by-product recovery
Assignee: United Engineers and Constructors Inc
•
Filing: 1950-09-26
•
Granted: 1954-12-14
•
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
2026-11-05 17:12
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN A PROCESS FOR THE RECOVERY OF BY-PRODUCTS FROM HOT COKE OVEN GASES WHEREIN AN IMPURE TAR CONTAINING FROM ABOUT 2% TO ABOUT 15% WATER, AND AMMONIA, IS REMOVED FROM THE HOT GASES, A METHOD OF PURIFYING THE IMPURE TAR WHICH COMPRISES HEATING SAID TAR TO A POINT IN THE RANGE FROM ABOUT 200 TO ABOUT 450* F. AND THEREBY RAISING THE PRESSURE UPON SAID IMPURE TAR, TO BETWEEN ABOUT 25 AND ABOUT 200 POUNDS PER SQUARE INCH GAUGE,
Claim 2
Dependent Claim
79 words
IN A PROCESS FOR THE RECOVERY OF BY-PRODUCTS FROM HOT COKE OVEN GASES WHEREIN AN IMPURE TAR CONTAINING FROM ABOUT 2% TO ABOUT 15% WATER, AND AMMONIA, IS REMOVED FROM THE HOT GASES, A METHOD OF PURIFYING THE IMPURE TAR WHICH COMPRISES HEATING SAID TAR TO A POINT IN THE RANGE FROM ABOUT 200 TO ABOUT 450* F. AND THEREBY RAISING THE PRESSURE UPON SAID IMPURE TAR, TO BETWEEN ABOUT 25 AND ABOUT 200 POUNDS PER SQUARE INCH GAUGE,
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) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |