US3660121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot top liner and refractory ring combination for use with metal hot top casing
Assignee: Susquehanna Corp
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Filing: 1970-02-05
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Granted: 1972-05-02
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Expires: 1990-02-05
Abstract
Abstract A combination of an exothermic insulting fiber and refractory ring for use in a metal hot top casing. The liner composition comprises by weight from 7-10 percent asbestos, from 7-12 percent wood flour, from 41-51 percent sand, from 26-32 percent silica flour and from 5-8 percent resin binder; and the refractory ring composition comprises by weight from 4.5-5.5 percent low water content asbestos, from 4.5-5.5 percent high water content asbestos, from 84-87 percent sand and from 4.5-6 percent resin binder.
Inventors
- 👤 James F Mccarthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/10; B22D7/104
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
16 words
The combination of claim 1 further characterized by said low water content asbestos being amosite asbestos.
Claim 2
Dependent Claim
16 words
The combination of claim 1 further characterized by said high water content asbestos being chrysotile asbestos.
Claim 3
Dependent Claim
25 words
The combination of claim 1 further characterized by the low water content asbestos being amosite asbestos and the high water content asbestos being chrysotile asbestos.
Claim 4
Dependent Claim
19 words
The composition of claim 1 further characterized by the asbestos for the hot top liner composition being amosite asbestos.
Claim 5
Dependent Claim
25 words
The combination of claim 1 further characterized by the sand for the hot top liner composition having an A.F.S. grain fineness number of about 110.
Claim 6
Dependent Claim
24 words
The combination of claim 1 further characterized by the sand for the refractory ring composition having an A.F.S. grain fineness number of about 110.
Claim 7
Dependent Claim
27 words
The combination of claim 1 further characterized by the resin binder for the hot top liner composition and for the refractory ring composition being a phenolformaldehyde resin.
Claim 8
Dependent Claim
21 words
The combination of claim 1 further characterized by the wood flour being softwood flour in amount about 8 to 10 percent.
Claim 9
Dependent Claim
21 words
The combination of claim 1 further characterized by the wood flour being hardwood flour in amount about 10 to 11 percent.
Claim 10
Dependent Claim
19 words
The combination of claim 1 further characterized by the silica flour having particle size smaller than about 200 mesh.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |