US3762935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed ceramic material
Assignee: Individual
•
Filing: 1971-09-29
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Granted: 1973-10-02
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Expires: 1991-09-29
Abstract
Abstract A foamed-in-place shaped article having high dimensional stability at extremes of heat and cold, good insulating properties, and high tensile strength, a composition for making the same, and the method thereof are disclosed. The composition contains aluminum oxide,a glass frit, bentonite, and phosphoric acid. Optional ingredients are aluminum hydroxide and a metal powder above hydrogen in the electromotive force series. The composition is charged to a mold and allowed to foam-in-place, and then is cured at a relatively low temperature.
Inventors
- 👤 S Leach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:59
CPC Classifications
C; C04; C04B; C04B38/00; C04B28/00; C04B28/34; C04B28/342; C04B35/00; C04B35/01; C04B35/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
A shaped article as defined in claim 1, wherein said glass comprises from about 24% to about 36% SiO2, from about 10% to about 25% B2O3, from about 15% to about 26% TiO2, from about 15% to about 20% Na2O, from about 3% to about 7% K2O, from about 4% to about 5% Li2O, from about 1% to about 11% BaO, from 0% to about 3% Sb2O3, from 0% to about 10% ZnO, and from 0% to about 3% Fe, said percentages being by weight.
Claim 2
Dependent Claim
16 words
A shaped article as defined in claim 2, wherein said ceramic foam structure comprises aluminum phosphate.
Claim 3
Dependent Claim
132 words
A composition for making a foamed-in-place shaped article having high dimensional stability at extremes of heat and cold good insulating properties, and high tensile strength, comprising a ceramic foam structure having a multiplicity of cells, said composition comprising from 0% to about 50% aluminum hydroxide, from 0% to about 50% aluminum oxide, from about 1.0% to about 20% glass frit, from about 0.5% to about 5.0% bentonite, from 0% to about 0.25% of a metal powder above hydrogen in the electromotive force series, and from about 35% to about 60% phosphoric acid, said metal powder being at least about 0.05% when said aluminum oxide is 0%, said aluminum hydroxide and aluminum oxide together comprising from about 30% to about 55% of said composition, said percentages being by weight of the total composition.
Claim 4
Dependent Claim
19 words
A composition as defined in claim 4, wherein said metal is aluminum and said phosphoric acid is orthophosphoric acid.
Claim 5
Dependent Claim
48 words
A composition as defined in claim 5, comprising from about 35 to about 42% aluminum oxide, from about 11% to about 18% glass frit, from about 1% to about 4% bentonite, from about 0.07% to about 0.1% aluminum powder, and from about 40% to about 50% orthophosphoric acid.
Claim 6
Dependent Claim
85 words
A composition as defined in claim 5, wherein said glass frit comprises from about 24% to about 36% SiO2, from about 10% to about 25% B2O3, from about 15% to about 26% TiO2, from about 15% to about 20% Na2O, from about 3% to about 7% K2O, from about 4% to about 5% Li2O, from about 1% to about 11% BaO, from 0% to about 3% Sb203, from 0% to about 10% ZnO, and from 0% to about 3% Fe, said percentages being by weight.
Claim 7
Dependent Claim
43 words
A composition as defined in claim 7, comprising about 150 parts by weight aluminum oxide, about 40 parts by weight glass frit, about 5 parts by weight bentonite, about 0.3 parts by weight aluminum powder, and about 170 parts by weight orthophosphoric acid.
Claim 8
Dependent Claim
42 words
A composition as defined in claim 8, wherein said glass frit comprises about 24.8% SiO2, about 14.9% B2O3, about 23.8% TiO2, about 19.8% Na2O, about 6.9% K2O, about 4.0% Li2O, about 1.0% BaO, about 3.0% Sb2O3, and about 1.8% Fe as Fe2O3.
Claim 9
Dependent Claim
24 words
A composition as defined in claim 4, further compris-ing an aggregate in an amount of up to 50% by weight of the total composition.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |