US3294562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory composition
Assignee: Alcoa Corp
•
Filing: 1964-12-11
•
Granted: 1966-12-27
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Expires: 1984-12-11
Abstract
No abstract record available.
Inventors
- 👤 Mario J Caprio
- 👤 Rudolf F Krisleit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:21
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A CERAMICALLY BONDED FIBROUS HEAT INSULATING REFRACTROY COMPOSITION CONSISTING ESSENTIALLY OF 40 TO 60% BY WEIGHT OF ABESTOS FIBER; 30 TO 20% BY WEIGHT OF CALCIUM ALUMINATE CEMENT; 30 TO 20% BY WEIGHT OF A FIBROUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF FIBROUS ALUMINA-SILCA WHICH IS REFRACTORY AND SUBSTANTIALLY INERT TOWARD MOLTEN ALUMINUM AND FIBROUS POTASSOIM TITANATE, HAVING A THERMAL CONDUCTIVITY OF ABOUT 2-4 B.T.U./HR./ FT.2/*F./IN.
Claim 2
Dependent Claim
67 words
A CERAMICALLY BONDED FIBROUS HEAT INSULATING REFRACTROY COMPOSITION CONSISTING ESSENTIALLY OF 40 TO 60% BY WEIGHT OF ABESTOS FIBER; 30 TO 20% BY WEIGHT OF CALCIUM ALUMINATE CEMENT; 30 TO 20% BY WEIGHT OF A FIBROUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF FIBROUS ALUMINA-SILCA WHICH IS REFRACTORY AND SUBSTANTIALLY INERT TOWARD MOLTEN ALUMINUM AND FIBROUS POTASSOIM TITANATE, HAVING A THERMAL CONDUCTIVITY OF ABOUT 2-4 B.T.U./HR./ FT.2/*F./IN.
References Cited (Backward Citations)
US3017318A
Cited
US2516892A
Cited
US2509599A
Cited
US2793128A
Cited
US3014872A
Cited
US3079267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |