Patent US2706844A successfully refreshed from Google Patents.
US2706844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulation of clay products
Assignee: Ohio State University Research Foundation
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Filing: 1951-01-15
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Granted: 1955-04-26
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Expires: 1971-01-15
Abstract
No abstract record available.
Inventors
- 👤 Clifford M Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:42
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A PROCESS OF MANUFACTURING A LIGHTWEIGHT CELLULAR STRUCTURE WHICH COMPRISES REDUCING A CERAMIC EARTH MATERIAL CONSISTING OF FORM 50 TO 75% BY WEIGHT SILICA, FROM 12 TO 35% BY WEIGHT ALUMINA, FORM 1 TO 20% BY WEIGHT CHEMICALLY COMBINED WATER AND FORM 10 TO 20% BY WEIGHT OF FLUXING OXIDES INCLUDING CALCIUM AND MAGNESIUM OXIDES PRESENT IN THE RATIO OF 1 PART BY WEIGHT MAGNESIUM OXIDE TO 1/2 TO 2 PARTS BY WEIGHT CALCUIM OXIDE A PARTICLE SIZE RANGING FROM 14-MES TO 200-MESH AND IN WHICH THE CALCIUM AND MAGNESIUM OXIDES ARE PERSENT IN THE RATIO OF 1 PART BY WEIGHT THEREOF TO 1-4 PARTS BY WEIGHT OF THE FLUXING OXIDES AMPENING, FORMING IN A PLURALITY OF BLOCKS, AND FIRING A PLURAITY OF SAID BLOCKS ADJACENT TO EACH OTHER WITHOUT REFRACTORY SEPERATORS TO A TEMPERATURE OF 2150* F. TO 2300*, SO THAT AS THE STRUCTURE IS HEATED AND SWELLS, THE PLURALITY OF BLOCKS FUSE TO EACH OTHER TO FORMED A LARGER BLOCK.
Claim 2
Dependent Claim
162 words
A PROCESS OF MANUFACTURING A LIGHTWEIGHT CELLULAR STRUCTURE WHICH COMPRISES REDUCING A CERAMIC EARTH MATERIAL CONSISTING OF FORM 50 TO 75% BY WEIGHT SILICA, FROM 12 TO 35% BY WEIGHT ALUMINA, FORM 1 TO 20% BY WEIGHT CHEMICALLY COMBINED WATER AND FORM 10 TO 20% BY WEIGHT OF FLUXING OXIDES INCLUDING CALCIUM AND MAGNESIUM OXIDES PRESENT IN THE RATIO OF 1 PART BY WEIGHT MAGNESIUM OXIDE TO 1/2 TO 2 PARTS BY WEIGHT CALCUIM OXIDE A PARTICLE SIZE RANGING FROM 14-MES TO 200-MESH AND IN WHICH THE CALCIUM AND MAGNESIUM OXIDES ARE PERSENT IN THE RATIO OF 1 PART BY WEIGHT THEREOF TO 1-4 PARTS BY WEIGHT OF THE FLUXING OXIDES AMPENING, FORMING IN A PLURALITY OF BLOCKS, AND FIRING A PLURAITY OF SAID BLOCKS ADJACENT TO EACH OTHER WITHOUT REFRACTORY SEPERATORS TO A TEMPERATURE OF 2150* F. TO 2300*, SO THAT AS THE STRUCTURE IS HEATED AND SWELLS, THE PLURALITY OF BLOCKS FUSE TO EACH OTHER TO FORMED A LARGER BLOCK.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-25 | 1958-10-25 | 1959-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-25 | 1962-10-25 | 1963-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-25 | 1966-10-25 | 1967-04-26 | $7700.00 | Window Closed / Lapsed |