Patent US2636827A successfully refreshed from Google Patents.
US2636827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory material and process
Assignee: General Refractories Co
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Filing: 1952-02-16
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Granted: 1953-04-28
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Expires: 1972-02-16
Abstract
No abstract record available.
Inventors
- 👤 Lanser Paul
- 👤 Skalla Norbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:18
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/043; C04B35/047; C04B35/0473
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE METHOD OF MAKING A NON-ACID REFRACTORY MATERIAL, WHICH COMPRISES MIXING TOGETHER MAGNESIA AND CHROMITE IN A RATIO OF ABOUT 80 TO 90 PARTS BY WEIGHT OF MAGNESIA TO 10 TO 20 PARTS BY WEIGHT OF CHROMITE, IN THE CASE WHERE SILICA IS IN EXCESS OF THE COMPOSITION OF DICALCIUM SILICATE ADDING LIME-BEARING MATERIAL IN QUANTITIES SUFFICIENT TO ADJUST THE TOTAL LIME-SILICA RATIO IN THE MIXTURE TO THAT APPROXIMATELY CORRESPONDING TO THE COMPOSITION OF DICALCIUM SILICATE, IN THE CASE WHERE LIME IS IN EXCESS OF THE COMPOSITION OF DICALCIUM SILICATE ADDING SILICABEARING MATERIAL IN QUANTITIES SUFFICIENT TO ADJUST THE TOTAL LIME SILICA RATIO IN THE MIXTURE TO THAT APPROXIMATELY CORRESPONDING TO THE COMPOSITION OF DICALCIUM SILICATE, FUSING THE MIXUTRE, AND THEREBY DEPOSITING DICALCIUM SILICATE AT THE EDGE OF THE MELT, ALLOWING THE MASS TO COOL SLOWLY AND SOLIDIFY, SEPARATING THE DICALCIUM SILICATE AND CRUSHING THE COFUSED MAGNESIA AND CHROMITE INTO PARTICLES.
Claim 2
Independent Claim
151 words
THE METHOD OF MAKING A NON-ACID REFRACTORY MATERIAL, WHICH COMPRISES MIXING TOGETHER MAGNESIA AND CHROMITE IN A RATIO OF ABOUT 80 TO 90 PARTS BY WEIGHT OF MAGNESIA TO 10 TO 20 PARTS BY WEIGHT OF CHROMITE, IN THE CASE WHERE SILICA IS IN EXCESS OF THE COMPOSITION OF DICALCIUM SILICATE ADDING LIME-BEARING MATERIAL IN QUANTITIES SUFFICIENT TO ADJUST THE TOTAL LIME-SILICA RATIO IN THE MIXTURE TO THAT APPROXIMATELY CORRESPONDING TO THE COMPOSITION OF DICALCIUM SILICATE, IN THE CASE WHERE LIME IS IN EXCESS OF THE COMPOSITION OF DICALCIUM SILICATE ADDING SILICABEARING MATERIAL IN QUANTITIES SUFFICIENT TO ADJUST THE TOTAL LIME SILICA RATIO IN THE MIXTURE TO THAT APPROXIMATELY CORRESPONDING TO THE COMPOSITION OF DICALCIUM SILICATE, FUSING THE MIXUTRE, AND THEREBY DEPOSITING DICALCIUM SILICATE AT THE EDGE OF THE MELT, ALLOWING THE MASS TO COOL SLOWLY AND SOLIDIFY, SEPARATING THE DICALCIUM SILICATE AND CRUSHING THE COFUSED MAGNESIA AND CHROMITE INTO PARTICLES.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |