US3341339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight castable refractory composition
Assignee: General Refractories Co
•
Filing: 1965-03-02
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Granted: 1967-09-12
•
Expires: 1985-03-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:39
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/08; C04B14/00; C04B14/02; C04B14/04; C04B14/10; C04B14/12; C04B28/00; C04B28/02; C04B28/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A LIGHTWEIGHT INSULATING CASTABLE REFRACTORY COMPOSITION, EXHIBITING A LINEAR SHRINKAGE OF LESS THAN 1.5% UPON FIRING AT A TEMPERATURE OF FROM ABOUT 2500 TO ABOUT 2800*F., CONSISTING ESSENTIALLY OF FROMABOUT 30 TO ABOUT 70 PARTS OF VESICULAR GRANULES OF THERMALLY BLOATED CLAY HAVING A PYROMETRIC CONE EQUIVALENT OF AT LEAST 20 ORTON, SAID GRANULES HAVING A BULK DENSITY NO GEAER THAN ABOUT 35 POUNDS PER CUBIC FOOT; FROM ABOUT 15 TO ABOUT 55 PARTS OF CRUDE KYANITE; AND FROM ABOUT 15 TO ABOUT 40 PARTS OF CALCIUM ALUMINATE CEMENT, SAID PARTS BEING PARTS BY WEIGHT BASED UPON THE COMBINED DRY WEIGHT OF SAID THREE INGREDIENTS, AND SAID GRANULES BEING FURTHER CHARACTERIZED IN HAVING A VITREOUS SKIN AND EXHIBITING SUBSTANTIAL SHRINKAGE UPON FIRING.
Claim 2
Dependent Claim
122 words
A LIGHTWEIGHT INSULATING CASTABLE REFRACTORY COMPOSITION, EXHIBITING A LINEAR SHRINKAGE OF LESS THAN 1.5% UPON FIRING AT A TEMPERATURE OF FROM ABOUT 2500 TO ABOUT 2800*F., CONSISTING ESSENTIALLY OF FROMABOUT 30 TO ABOUT 70 PARTS OF VESICULAR GRANULES OF THERMALLY BLOATED CLAY HAVING A PYROMETRIC CONE EQUIVALENT OF AT LEAST 20 ORTON, SAID GRANULES HAVING A BULK DENSITY NO GEAER THAN ABOUT 35 POUNDS PER CUBIC FOOT; FROM ABOUT 15 TO ABOUT 55 PARTS OF CRUDE KYANITE; AND FROM ABOUT 15 TO ABOUT 40 PARTS OF CALCIUM ALUMINATE CEMENT, SAID PARTS BEING PARTS BY WEIGHT BASED UPON THE COMBINED DRY WEIGHT OF SAID THREE INGREDIENTS, AND SAID GRANULES BEING FURTHER CHARACTERIZED IN HAVING A VITREOUS SKIN AND EXHIBITING SUBSTANTIAL SHRINKAGE UPON FIRING.
References Cited (Backward Citations)
US2419684A
Cited
US2963377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |