US3269849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous refractory
Assignee: Alcoa Corp
•
Filing: 1964-12-11
•
Granted: 1966-08-30
•
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
2026-10-26 21:29
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A CERAMICALLY BONDED FIBROUS HEAT INSULATING REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF 40 TO 60% BY WEIGHT OF ASBESTOS FIBER; 25 TO 20% BY WEIGHT OF CALCIUM ALUMINATE CEMENT; 5 TO 2.5% BY WEIGHT OF CRYOLITE; 30 TO 20% BY WEIGHT OF A FIBROUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF FIBROUS ALUMINA-SILICA WHICH IS REFRACTORY AND SUBSTANTIALLY INERT TOWARD MOLTEN ALUMINUM AND FIBROUS POTASSIUM TITANATE, HAVING A THERMAL CONDUCTIVITY OF ABOUT 2-4 B.T.U./HR./FT.2/* F./IN.
Claim 2
Dependent Claim
74 words
A CERAMICALLY BONDED FIBROUS HEAT INSULATING REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF 40 TO 60% BY WEIGHT OF ASBESTOS FIBER; 25 TO 20% BY WEIGHT OF CALCIUM ALUMINATE CEMENT; 5 TO 2.5% BY WEIGHT OF CRYOLITE; 30 TO 20% BY WEIGHT OF A FIBROUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF FIBROUS ALUMINA-SILICA WHICH IS REFRACTORY AND SUBSTANTIALLY INERT TOWARD MOLTEN ALUMINUM AND FIBROUS POTASSIUM TITANATE, HAVING A THERMAL CONDUCTIVITY OF ABOUT 2-4 B.T.U./HR./FT.2/* F./IN.
References Cited (Backward Citations)
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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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |