Patent US3871869A successfully refreshed from Google Patents.
US3871869A
Expired / Lapsed
US
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Process for pressing briquettes from powdered substances more particularly from fine-grained fluorspar and briquettes thus obtained
Assignee: Hoogovens Ijmuiden BV
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Filing: 1973-07-03
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Granted: 1975-03-18
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Expires: 1993-07-03
Abstract
Abstract A process for producing a fine-ground fluorspar in briquette form in which the fine-ground fluorspar is intimately mixed with from 0.5 to 6% by weight of molasses after which the mixture is further mixed with from 0.5 to 5% by weight of cement at room temperature and the resultant mixture is compressed into briquettes.
Inventors
- 👤 Willem B Overdijk
- 👤 Adam Steen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:33
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C7/00; C21C7/04; C21C7/076; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
34 words
A PROCESS FOR PRODUCING PRESSED BRIQUETTES COMPRISING MIXING POWDERED FLUORSPAR WITH FROM 0.5 TO 6% BY WEIGHT OF MOLASSES AND 0.5 TO 5% BY WEIGHT OF CEMENT AND COMPRESSING THE RESULTANT MIXTURE INTO BRIQUETTES.
Claim 2
Dependent Claim
34 words
A PROCESS FOR PRODUCING PRESSED BRIQUETTES COMPRISING MIXING POWDERED FLUORSPAR WITH FROM 0.5 TO 6% BY WEIGHT OF MOLASSES AND 0.5 TO 5% BY WEIGHT OF CEMENT AND COMPRESSING THE RESULTANT MIXTURE INTO BRIQUETTES.
Claim 3
Dependent Claim
42 words
The process according to claim 1, in which the powdered fluorspar has a particle size of at most 4mm and the molasses is intimately mixed with the fluorspar after which the cement is mixed with the molasses and fluorspar at room temperature.
Claim 4
Dependent Claim
21 words
The process according to claim 2, in which 4% by weight of molasses and 2% by weight of cement is utilized.
Claim 5
Dependent Claim
21 words
The process according to claim 1, in which the material is pressed into briquettes with the aid of a briquette roller.
Claim 6
Dependent Claim
21 words
Pressed briquettes comprising fine-grained fluorspar, from 0.5 to 6% by weight of molasses and 0.5 to 5% by weight of cement.
Claim 7
Dependent Claim
21 words
Pressed briquettes comprising fine-grained fluorspar, from 0.5 to 6% by weight of molasses and 0.5 to 5% by weight of cement.
Claim 8
Dependent Claim
53 words
A process for adding fluorspar to the contents of a convertor or casting ladle, comprising passing the fluorspar to the convertor or casting ladle in the form of briquettes, which are composed of fine-grained aggregates with as binder 0.5% to 6% by weight of molasses and 0.5% to 5% by weight of cement.
Claim 9
Dependent Claim
53 words
A process for adding fluorspar to the contents of a convertor or casting ladle, comprising passing the fluorspar to the convertor or casting ladle in the form of briquettes, which are composed of fine-grained aggregates with as binder 0.5% to 6% by weight of molasses and 0.5% to 5% by weight of cement.
Claim 10
Dependent Claim
50 words
A process for producing pressed briquettes from powdered substances selected from the group consisting of ferro-manganese, ferro-silicon, calcium flux-mixtures and colemanite coMprising mixing said powdered substance with from 0.5 to 6% by weight of molasses and 0.5 to 5% by weight of cement and compressing the resultant mixture into briquettes.
Claim 11
Dependent Claim
50 words
A process for producing pressed briquettes from powdered substances selected from the group consisting of ferro-manganese, ferro-silicon, calcium flux-mixtures and colemanite coMprising mixing said powdered substance with from 0.5 to 6% by weight of molasses and 0.5 to 5% by weight of cement and compressing the resultant mixture into briquettes.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |