US3965020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siliceous thermal insulation and method of making same
Assignee: Morgan Advanced Materials PLC
•
Filing: 1973-09-20
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Granted: 1976-06-22
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Expires: 1993-09-20
Abstract
Abstract A method is disclosed for the formation of a siliceous thermal insulation, usable to 2000 DEG F., from calcined and natural diatomite powders, hydrated lime, clay and synthetic fibers. The shaped insulating product obtained is also disclosed.
Inventors
- 👤 Charles H. Noll
- 👤 James B. Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:28
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B28/00; C04B28/18; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
92 words
A method of forming a shaped predominately siliceous thermal insulation which consists essentially of a. mixing in an aqueous medium at a temperature in the range of 170°-210°F. components including no natural inorganic fiber and consisting essentially of 60-85 wt. % diatomite powder 5-10 wt. % hydrated lime 8-14 wt. % clay and 1-8 wt. % synthetic fibers; b. allowing the mixed components to stand for a period of 0.5-2.0 hours at a temperature in the range of 150°-200°F.; c. molding the desired shape, and d. drying said shaped siliceous thermal insulation.
Claim 2
Independent Claim
92 words
A method of forming a shaped predominately siliceous thermal insulation which consists essentially of a. mixing in an aqueous medium at a temperature in the range of 170°-210°F. components including no natural inorganic fiber and consisting essentially of 60-85 wt. % diatomite powder 5-10 wt. % hydrated lime 8-14 wt. % clay and 1-8 wt. % synthetic fibers; b. allowing the mixed components to stand for a period of 0.5-2.0 hours at a temperature in the range of 150°-200°F.; c. molding the desired shape, and d. drying said shaped siliceous thermal insulation.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the diatomite powder component comprises a mixture of calcined and natural diatomite powders.
Claim 4
Dependent Claim
29 words
The method of claim 2 wherein said calcined diatomite powder comprises at least 80% of said mixture and said natural diatomite powder comprises up to 20% of said mixture.
Claim 5
Dependent Claim
16 words
The method of claim 3 wherein said mixture comprises 85-95% calcined diatomite and 5-15% natural diatomite.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein said diatomite component consists essentially of calcined diatomite.
Claim 7
Dependent Claim
23 words
The method of claim 1 wherein said mixing is in an aqueous medium wherein the water:solids ratio is in the range of 6-12:1.
Claim 8
Dependent Claim
15 words
The method of claim 6 wherein said water:solids ratio is in the range of 8-10:1.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein said components also include 0.5-4.0 wt. percent natural organic fibers.
Claim 10
Dependent Claim
13 words
The method of claim 1 wherein said molding is accomplished by filter pressing.
Claim 11
Dependent Claim
25 words
The method of claim 1 said drying is accomplished by exposing the molded shape to air at a temperature in the range of 300°-450° F.
Claim 12
Dependent Claim
44 words
The method of claim 1 wherein said components comprise approximately 67 wt. % calcined diatomite powder 11 wt. % natural diatomite powder 7 wt. % hydrated lime 11 wt. % bentonite clay 2 wt. % synthetic fiber and 2 wt. % natural organic fiber
Claim 13
Dependent Claim
14 words
A shaped article of siliceous thermal insulation made by the method of claim 11.
Claim 14
Dependent Claim
84 words
A predominately siliceous shaped article containing no natural inorganic fiber and consisting essentially of the product of the reaction of 60-85 wt. % diatomite powder 5-10 wt. % hydrated lime 8-14 wt. % clay and 1-8 wt. % synthetic fiber and produced by a process consisting essentially of mixing in an aqueous medium at a temperature in the range of 170°-210°F., being allowed to stand for a period of 0.5-2.0 hours at a temperature of 150°-200°F., and then being molded to shape and dried.
Claim 15
Dependent Claim
84 words
A predominately siliceous shaped article containing no natural inorganic fiber and consisting essentially of the product of the reaction of 60-85 wt. % diatomite powder 5-10 wt. % hydrated lime 8-14 wt. % clay and 1-8 wt. % synthetic fiber and produced by a process consisting essentially of mixing in an aqueous medium at a temperature in the range of 170°-210°F., being allowed to stand for a period of 0.5-2.0 hours at a temperature of 150°-200°F., and then being molded to shape and dried.
Claim 16
Dependent Claim
13 words
The article of claim 13 having the shape of a flat rectangular block.
Claim 17
Dependent Claim
18 words
The article of claim 13 having the shape of the axial half of a hollow right circular cylinder.
Claim 18
Dependent Claim
14 words
The article of claim 13 having the shape of a slightly curved rectangular block.
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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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |