US4430851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twisted ceramic fiber sewing thread
Assignee: 3M Co
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Filing: 1982-01-29
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Granted: 1984-02-14
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Expires: 2002-01-29
Abstract
Abstract A twisted sewing thread comprising at least two strands made of ceramic fibers at least one of which strands is served with organic or inorganic fibers, the strands being individually twisted or two or more strands twisted together in one direction and then an assembly of the resulting twisted strands plied with other like or different twisted strands in the opposite direction to produce the ceramic fiber sewing thread.
Inventors
- 👤 Douglas C. Sundet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:47
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D02G3/16; D02G3/22; D02G3/36; D02G3/44; D02G3/46; Y; Y10; Y10S; Y10S57/00; Y10S57/903
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
86 words
A sewing thread comprising: at least two strands of continuous non-vitreous ceramic fibers selected from the class consisting of graphite-containing, silicon carbide-containing, and ceramic metal oxide-containing fibers, at least one of which strands is served with organic or inorganic yarn, said strands being twisted in one direction, and an assembly of the resulting twisted strands plied with other strands of non-vitreous continuous ceramic fibers selected from the class consisting of graphite-containing, silicon carbide-containing, and ceramic metal oxide-containing fibers in the opposite direction to form a thread.
Claim 2
Dependent Claim
86 words
A sewing thread comprising: at least two strands of continuous non-vitreous ceramic fibers selected from the class consisting of graphite-containing, silicon carbide-containing, and ceramic metal oxide-containing fibers, at least one of which strands is served with organic or inorganic yarn, said strands being twisted in one direction, and an assembly of the resulting twisted strands plied with other strands of non-vitreous continuous ceramic fibers selected from the class consisting of graphite-containing, silicon carbide-containing, and ceramic metal oxide-containing fibers in the opposite direction to form a thread.
Claim 3
Dependent Claim
15 words
The sewing thread according to claim 1 wherein said ceramic fibers are non-vitreous ceramic fibers.
Claim 4
Dependent Claim
33 words
The sewing thread according to claim 1 wherein said ceramic fibers are selected from fused silica, silicon carbide, alumina-silica, thoria-silica-metal (III) oxide, zirconia-silica, alumina-chromia-metal (IV) oxide, titania, and alumina-boria-silica fibers, or blends thereof.
Claim 5
Dependent Claim
33 words
The sewing thread according to claim 1 wherein said strands each have a number of fibers in the range of 25 to 1000 and a denier on the range of 50 to 1800.
Claim 6
Dependent Claim
12 words
The sewing thread according to claim 1 having 2 to 12 strands.
Claim 7
Dependent Claim
17 words
The sewing thread according to claim 1 the integrity of which is maintained up to 1150° C.
Claim 8
Dependent Claim
17 words
The sewing thread according to claim 1 the integrity of which is mintained up to 1500° C.
Claim 9
Dependent Claim
14 words
The sewing thread according to claim 1 wherein said ceramic fibers are alumina-boria-silica fibers.
Claim 10
Dependent Claim
23 words
The sewing thread according to claim 1 wherein the material used for serving is selected from organic and inorganic yarn or blends thereof.
Claim 11
Dependent Claim
28 words
The sewing thread according to claim 9 wherein the material used for serving is selected from twisted or untwisted rayon, polyester, polyamide, elastomeric, cotton yarn or blends thereof.
Claim 12
Dependent Claim
26 words
The sewing thread according to claim 9 wherein the material used for serving is inorganic yarn selected from fibers of refractory metal and fused silica fibers.
Claim 13
Dependent Claim
21 words
The sewing thread according to claim 9 wherein the serving yarn has a denier in the range of 30 to 300.
Claim 14
Dependent Claim
15 words
The sewing thread according to claim 9 wherein said serving yarn is 50 denier rayon.
Claim 15
Dependent Claim
14 words
The sewing thread according to claim 1 wherein said serving yarn is heat fugitive.
Claim 16
Dependent Claim
26 words
The sewing thread according to claim 1 which is served as a whole with yarn of fiber selected from organic and inorganic fibers or blends thereof.
Claim 17
Dependent Claim
72 words
A sewing thread comprising: two strands of continuous ceramic fibers, each of said strands having a number of filaments in the range of 130 to 500 and a fiber denier in the range of 400 to 900, and said strands being individually served with 50 denier rayon, said served strands being twisted, and said twisted strands being aggregated and plied with three other like twisted strands to form a 2/4 sewing thread.
Claim 18
Dependent Claim
72 words
A sewing thread comprising: two strands of continuous ceramic fibers, each of said strands having a number of filaments in the range of 130 to 500 and a fiber denier in the range of 400 to 900, and said strands being individually served with 50 denier rayon, said served strands being twisted, and said twisted strands being aggregated and plied with three other like twisted strands to form a 2/4 sewing thread.
Claim 19
Dependent Claim
33 words
The sewing thread according to claims 1 or 16 wherein said ceramic fibers are alumina-boria-silica fibers having an alumina:boria mol ratio of 9:2 to 3:1.5, and containing up to 65 weight percent silica.
Claim 20
Dependent Claim
24 words
The sewing thread according to claims 1 or 16 wherein said ceramic fibers are alumina-silica fibers having an alumina to silica ratio of 3:2.
Claim 21
Dependent Claim
14 words
A high temperature resistant article sewn with the sewing thread according to claim 1.
Claim 22
Dependent Claim
15 words
A high temperature resistant fabric article sewn with the sewing thread according to claim 1.
Claim 23
Dependent Claim
19 words
The sewing thread according to claim 1 wherein said strands of ceramic fibers are individually twisted in one direction.
Claim 24
Dependent Claim
20 words
The sewing thread according to claim 21 wherein said individually twisted strands are served again with organic or inorganic yarn.
Claim 25
Dependent Claim
19 words
The sewing thread according to claim 1 wherein said strands of ceramic fibers are twisted together in one direction.
Claim 26
Dependent Claim
20 words
The sewing thread according to claim 23 wherein said twisted together strands are served again with organic or inorganic yarn.
Claim 27
Dependent Claim
25 words
The sewing thread according to claim 1 wherein said assembly of resulting twisted strands are plied with other like twisted strands of continuous ceramic fibers.
Claim 28
Dependent Claim
24 words
The sewing thread according to claim 1 wherein said assembly of resulting twisted strands are plied with other different twisted strands of continuous fibers.
Claim 29
Dependent Claim
56 words
A sewing thread comprising at least one twisted strand of continuous non-vitreous ceramic fibers selected from the class consisting of graphite-containing, silicon carbide-containing, and ceramic metal oxide-containing fibers, said twisted strand being served with an organic or inorganic yarn, the integrity of said thread being capable of being maintained up to a temperature of 1500° C.
Claim 30
Dependent Claim
56 words
A sewing thread comprising at least one twisted strand of continuous non-vitreous ceramic fibers selected from the class consisting of graphite-containing, silicon carbide-containing, and ceramic metal oxide-containing fibers, said twisted strand being served with an organic or inorganic yarn, the integrity of said thread being capable of being maintained up to a temperature of 1500° C.
Claim 31
Dependent Claim
93 words
A sewing thread comprising: at least two strands of continuous non-vitreous ceramic fibers, each of said strands having a number of filaments in the range of 130 to 500 and a fiber denier in the range of 400 to 900, and said strands being served with organic or inorganic yarn having a fiber denier in the range of 30 to 300, said served strands being twisted, and said twisted strands being aggregated and plied with other served, twisted strands of continuous, ceramic metal oxide-containing fibers in the opposite direction to form a thread.
Claim 32
Dependent Claim
93 words
A sewing thread comprising: at least two strands of continuous non-vitreous ceramic fibers, each of said strands having a number of filaments in the range of 130 to 500 and a fiber denier in the range of 400 to 900, and said strands being served with organic or inorganic yarn having a fiber denier in the range of 30 to 300, said served strands being twisted, and said twisted strands being aggregated and plied with other served, twisted strands of continuous, ceramic metal oxide-containing fibers in the opposite direction to form a thread.
Claim 33
Dependent Claim
78 words
A sewing thread comprising: at least two strands of continuous non-vitreous ceramic fibers selected from the class consisting of ceramic metal oxide-containing fibers, at least one of which strands is served with organic or inorganic yarn, said strands being twisted in one direction, and an assembly of the resulting twisted strands plied with other strands of non-vitreous continuous ceramic fibers selected from the class consisting of ceramic metal oxide-containing fibers in the opposite direction to form a thread.
Claim 34
Dependent Claim
78 words
A sewing thread comprising: at least two strands of continuous non-vitreous ceramic fibers selected from the class consisting of ceramic metal oxide-containing fibers, at least one of which strands is served with organic or inorganic yarn, said strands being twisted in one direction, and an assembly of the resulting twisted strands plied with other strands of non-vitreous continuous ceramic fibers selected from the class consisting of ceramic metal oxide-containing fibers in the opposite direction to form a thread.
Claim 35
Dependent Claim
52 words
A sewing thread comprising at least one twisted strand of continuous non-vitreous ceramic fibers selected from the class consisting of ceramic metal oxide-containing fibers, said twisted strand being served with an organic or inorganic yarn, the integrity of said thread being capable of being maintained up to a temperature of 1500° C.
Claim 36
Dependent Claim
52 words
A sewing thread comprising at least one twisted strand of continuous non-vitreous ceramic fibers selected from the class consisting of ceramic metal oxide-containing fibers, said twisted strand being served with an organic or inorganic yarn, the integrity of said thread being capable of being maintained up to a temperature of 1500° C.
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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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |