US3060043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory castable
Assignee: Harbison Walker Refractories Co
•
Filing: 1960-03-31
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Granted: 1962-10-23
•
Expires: 1980-03-31
Abstract
No abstract record available.
Inventors
- 👤 Albert L Renkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:17
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B18/00; C04B18/04; C04B18/14; C04B18/146; C04B28/00; C04B28/02; C04B28/06; C04B35/66; C04B2111/00; C04B2111/20; C04B2111/28; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/3231; C04B2235/3241; C04B2235/34; C04B2235/3418; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A REFRACTORY CASTABLE FOR USE IN TEMPERTURE RANGE OF ABOUT 500 TO 2000*F. AND CHARACTERIZED BY HAVING IMPROVED STRENGTH AND ABRASION RESISTANCE CONSISTING ESSENTIALLY OF, BY WEIGHT, ABOUT 55 TO 90 PERCENT OF A HEAT RESISTANT AGGREGATE, ABOUT 9 TO 40 PERCENT OF CALCIUM ALUMINATE CEMENT AND ABOUT 1 TO 5 PERCENT OF CALTILIZED SILICA, THE TOTAL COMPRISING 100 PER CENT, THE CAO TO AL2O2 RATIO, BY WEIGHT, IN THE CALCIUM ALUMINATES CEMENT BEING AT LEAST 1:1.
Claim 2
Dependent Claim
77 words
A REFRACTORY CASTABLE FOR USE IN TEMPERTURE RANGE OF ABOUT 500 TO 2000*F. AND CHARACTERIZED BY HAVING IMPROVED STRENGTH AND ABRASION RESISTANCE CONSISTING ESSENTIALLY OF, BY WEIGHT, ABOUT 55 TO 90 PERCENT OF A HEAT RESISTANT AGGREGATE, ABOUT 9 TO 40 PERCENT OF CALCIUM ALUMINATE CEMENT AND ABOUT 1 TO 5 PERCENT OF CALTILIZED SILICA, THE TOTAL COMPRISING 100 PER CENT, THE CAO TO AL2O2 RATIO, BY WEIGHT, IN THE CALCIUM ALUMINATES CEMENT BEING AT LEAST 1:1.
References Cited (Backward Citations)
US2428178A
Cited
US2527500A
Cited
US2511725A
Cited
US2558782A
Cited
US2736660A
Cited
US2874071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |