Patent US3567428A successfully refreshed from Google Patents.
US3567428A
Expired / Lapsed
US
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Process for cold hardening of pellets
Assignee: Trafikaktiebolaget Grangesberg-Oxelosund
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Filing: 1969-01-21
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Granted: 1971-03-02
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Expires: 1989-01-21
Abstract
Abstract THE INVENTION RELATES TO A PROCESS FOR THE COLD HARDENING OF PELLETS COMPRISING FINELY DIVIDED METAL OXIDE, FINELY DIVIDED HYDRAULIC BINDING AGENT, WATER AND COKE BREEZE OR PETROLEUM COKE. GREEN PELLETS ARE PRODUCED AND THEN EMBEDDED IN A MASS OF THE FINELY DIVIDED METAL OXIDE IN SUCH A WAY THAT, IN PRINCIPLE THEY ARE ISOLATED FROM EACH OTHER. THE MASS OF THE FINELY DIVIDED METAL OXIDE IS SEPARATED WHEN THE PELLETS, THANKS TO THE SETTING EFFECT OF THE HYDRAULIC BINDING AGENT HAVE ACHIEVED AN ACCEPTABLE STRENGTH.
Inventors
- 👤 Karl Jonas Valter Svensson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:54
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C22B1/243; C04; C04B; C04B14/00; C04B14/02; C04B14/022; C04B28/00; C04B28/02; C22B1/2406
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |