US2845360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosion resistant refractory castable
Assignee: Harbison Walker Refractories Co
•
Filing: 1956-12-11
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Granted: 1958-07-29
•
Expires: 1976-12-11
Abstract
No abstract record available.
Inventors
- 👤 Donald F King
- 👤 Albert L Renkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:09
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
AN EXPLOSION RESISTANT REFRACTORY CASTABLE CONSISTING ESSENTIALLY OF REFRACTORY AGGREGATE SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND ALUMINA SILICA AGGREGATE AND A HIGH ALUMINA, CALCIUM ALUMINATE CEMENT WHICH HAS AN AL2O3 TO CAO RATIO OF ABOUT 2:1 TO 6:1 BY WEIGHT AND CONTAINING BORIC ACID IN AN AMOUNT OF ABOUT 0.02 TO 1.5 PERCENT BASED ON THE WEIGHT OF THE MIXTURE.
Claim 2
Dependent Claim
62 words
AN EXPLOSION RESISTANT REFRACTORY CASTABLE CONSISTING ESSENTIALLY OF REFRACTORY AGGREGATE SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND ALUMINA SILICA AGGREGATE AND A HIGH ALUMINA, CALCIUM ALUMINATE CEMENT WHICH HAS AN AL2O3 TO CAO RATIO OF ABOUT 2:1 TO 6:1 BY WEIGHT AND CONTAINING BORIC ACID IN AN AMOUNT OF ABOUT 0.02 TO 1.5 PERCENT BASED ON THE WEIGHT OF THE MIXTURE.
References Cited (Backward Citations)
US2516892A
Cited
US2684913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |