Patent US3149958A successfully refreshed from Google Patents.
US3149958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintering process
Assignee: ChampionX LLC
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Filing: 1962-04-16
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Granted: 1964-09-22
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Expires: 1982-04-16
Abstract
No abstract record available.
Inventors
- 👤 William J Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:51
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A METHOD OF INCREASING THE EFFICIENCY OF AN IRON ORE SINTERING OPERATION AND IMPROVING THE PRODUCT THEREOF, THE STEPS WHICH COMPRISE ADDING TOGETHER A MINOR AMOUNT OF A BINDER COMPRISING A SALT OF LEONARDITE WITH A MAJOR AMOUNT OF A BURDEN, SAID BURDEN COMPRISING FINELY DIVIDED IRON ORE, COKE, A CALCIUM CARBONATE-CONTAINING MATERIAL AND AN AQUEOUS LIQUID, MIXING SAID BINDER AND SAID BURDEN TO FORM A COMPOSITE THEREOF, PELLETIZING SAID COMPOSITE BY FLOWING SAID COMPOSITE UPON A REVOLVING SURFACE SO AS TO AGGLOMERATE SAID COMPOSITE INTO PELLETS, HEATING SAID PELLETS FOR A SUFFICIENT TIME TO FORM A FUED MASS AND FINALLY BREAKING SAID MASS INTOSMALLER UNITS USEFUL AS A BLAST FURNACE FEED.
Claim 2
Dependent Claim
113 words
IN A METHOD OF INCREASING THE EFFICIENCY OF AN IRON ORE SINTERING OPERATION AND IMPROVING THE PRODUCT THEREOF, THE STEPS WHICH COMPRISE ADDING TOGETHER A MINOR AMOUNT OF A BINDER COMPRISING A SALT OF LEONARDITE WITH A MAJOR AMOUNT OF A BURDEN, SAID BURDEN COMPRISING FINELY DIVIDED IRON ORE, COKE, A CALCIUM CARBONATE-CONTAINING MATERIAL AND AN AQUEOUS LIQUID, MIXING SAID BINDER AND SAID BURDEN TO FORM A COMPOSITE THEREOF, PELLETIZING SAID COMPOSITE BY FLOWING SAID COMPOSITE UPON A REVOLVING SURFACE SO AS TO AGGLOMERATE SAID COMPOSITE INTO PELLETS, HEATING SAID PELLETS FOR A SUFFICIENT TIME TO FORM A FUED MASS AND FINALLY BREAKING SAID MASS INTOSMALLER UNITS USEFUL AS A BLAST FURNACE FEED.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |