Patent US3753751A successfully refreshed from Google Patents.
US3753751A
Expired / Lapsed
US
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Light weight bodies of cotton fiber reinforced hydrous alkaline earth metal silicate thermal insulation material
Assignee: Owens Corning
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Filing: 1970-03-12
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Granted: 1973-08-21
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Expires: 1990-03-12
Abstract
Abstract A synthetically prepared body of molded high temperature thermal insulation material composed essentially of a matrix of chemically combined alkaline earth metal silicate interspersed with cotton fibers tenaciously anchored into the matrix and providing reinforcement and increased structural strength and integrity to the insulation material. The cotton fibers are interspersed in the matrix of the insulation material in the form of individual or wound groupings of filaments, strands or rovings or the like and/or in the form of an open network fabric of interlocked or interwoven cotton fibers such as cotton mesh or cotton netting or the like.
Inventors
- 👤 R Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:41
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/02; F16L59/029; C; C04; C04B; C04B28/00; C04B28/18; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
32 words
An aqueous slurry as defined in claim 1, wherein said string-type strands of cotton fibers are present in said slurry in the form of randomly dispersed lengths of multiple ply cotton string.
Claim 2
Dependent Claim
33 words
An aqueous slurry as defined in claim 1, wherein said multiple ply cotton string is characterized by having a weight to length ratio of from about 7 to 29 grams per 100 feet.
Claim 3
Dependent Claim
29 words
An aqueous slurry as defined in claim 1, wherein said string-type strands of cotton fibers are not in excess of 15 percent by weight of said finely divided solids.
Claim 4
Dependent Claim
23 words
An aqueous slurry as defined in claim 1, wherein said string-type strands of cotton fibers are impregnated with an adjunct fiber stiffening material.
Claim 5
Dependent Claim
19 words
An aqueous slurry as defined in claim 5, wherein said cotton fiber stiffening material is composed of sodium silicate.
Claim 6
Dependent Claim
38 words
An aqueous slurry as defined in claim 5, wherein said cotton fiber stiffening material is the dry residue of a solution composed of approximately 32.8 parts by weight of Na2O.3.25SiO2 is approximately 172.2 parts by weight of water.
Claim 7
Dependent Claim
21 words
An aqueous slurry as defined in claim 5, wherein said cotton fiber stiffening material is a heat set organic plastic resin.
Claim 8
Dependent Claim
21 words
An aqueous slurry as defined in claim 5, wherein said cotton fiber stiffening material is a heat set epoxy coating resin.
Claim 9
Dependent Claim
18 words
An aqueous slurry as defined in claim 5, wherein said cotton fiber stiffening material is a phenolic resin.
Claim 10
Dependent Claim
122 words
In the process of forming an aqueous slurry preparatory to transformation of said slurry into a self-supportinG body of hydrous alkaline earth metal silicate insulation material comprising preparing an aqueous slurry consisting essentially of water, reinforcing fibers and hydrothermally reactive proportions of finely divided alkaline earth metal silicate insulation forming constituents, the improvement comprising: mixing cotton fibers having a length of more than about one-half inch into said aqueous slurry in an amount from 1 percent to 25 percent of the combined weight of fibers and finely divided insulation forming constituents, said fibers being spaced apart or unconnected strands of more than about one-half inch in length to give uniform reinforcement throughout the slurry in the form of spaced apart twisted strands.
Claim 11
Dependent Claim
38 words
The improvement in the process according to claim 11, wherein at least a portion of said twisted strands of cotton fibers are included in said aqueous slurry in the form of an interconnected open-mesh network of cotton fibers.
Claim 12
Dependent Claim
29 words
The improvement in the process according to claim 11, wherein essentially all of said twisted strands of cotton fibers range from at least one-half to two inches in length.
Claim 13
Dependent Claim
19 words
The process of claim 11 wherein said strands are unconnected and are impregnated with an adjunct fiber stiffening material.
Claim 14
Dependent Claim
20 words
The process of claim 14 wherein said adjunct fiber stiffening material is the dry residue of a liquid sodium silicate.
References Cited (Backward Citations)
US2698251A
Cited
US2698256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |