Patent US4136133A successfully refreshed from Google Patents.
US4136133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymer of poly (oxa-amide) and polyamide
Assignee: Sun Ventures Inc
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Filing: 1977-03-04
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Granted: 1979-01-23
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Expires: 1997-03-04
Abstract
Abstract Novel block copolymer formed by melting blending a melt spinnable polyamide such as nylon-6 and a poly(oxa-amide) such as poly(4-oxaheptamethylene adipamide) (also known as N-303-6) is disclosed. Said copolymer has utility as a fiber. The fiber of copolymer, for example of nylon-6 and said poly-(oxa-amide) has superior absorption characteristics than that of nylon-6. Furthermore, resulting fiber (N-303-6//6) still substantially maintains the other desirable properties of the major constituent, for example nylon-6.
Inventors
- 👤 Robert M. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:29
CPC Classifications
C; C08; C08G; C08G69/00
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
72 words
A block copolymer having a molecular weight of about 5000-100,000 and the following repeating structural formula: ##STR10## wherein R 1 , R 2 and R 3 are selected from the group consisting of H, C 1 -C 10 alkyls and C 3 -C 10 isoalkyls; R 4 is selected from the group consisting of C 0 -C 10 alkylenes and C 3 -C 10 isoalkylene; and y = 4-200 z = 4-200.
Claim 2
Dependent Claim
72 words
A block copolymer having a molecular weight of about 5000-100,000 and the following repeating structural formula: ##STR10## wherein R 1 , R 2 and R 3 are selected from the group consisting of H, C 1 -C 10 alkyls and C 3 -C 10 isoalkyls; R 4 is selected from the group consisting of C 0 -C 10 alkylenes and C 3 -C 10 isoalkylene; and y = 4-200 z = 4-200.
Claim 3
Dependent Claim
11 words
A copolymer according to claim 1 wherein the copolymer is hydrophilic.
Claim 4
Dependent Claim
24 words
A copolymer according to claim 2 wherein the copolymer has a percent moisture regain of at least 4% at a relative humidity of 65%.
Claim 5
Dependent Claim
22 words
A copolymer according to claim 1 wherein the bivalent radical polyamide is selected from the group consisting of nylon-6, nylon-6,6 and PACM-12.
Claim 6
Dependent Claim
11 words
A copolymer according to claim 4 wherein the copolymer is hydrophilic.
Claim 7
Dependent Claim
24 words
A copolymer according to claim 5 wherein the copolymer has a percent moisture regain of at least 4% at a relative humidity of 65%.
Claim 8
Dependent Claim
27 words
A copolymer according to claim 6 where R 1 , R 2 and R 3 are H and R 4 is a C 1 -C 10 alkylene.
Claim 9
Dependent Claim
14 words
A copolymer according to claim 7 wherein R 4 is a C 2 alkylene.
Claim 10
Dependent Claim
10 words
A fiber obtained by spinning the copolymer of claim 1.
Claim 11
Dependent Claim
10 words
A fiber obtained by spinning the copolymer of claim 7.
Claim 12
Dependent Claim
10 words
A fiber obtained by spinning the copolymer of claim 8.
Claim 13
Dependent Claim
14 words
A fiber according to claim 1 wherein the fiber is obtained by melt spinning.
Claim 14
Dependent Claim
14 words
A fiber according to claim 7 wherein the fiber is obtained by melt spinning.
Claim 15
Dependent Claim
14 words
A fiber according to claim 8 wherein the fiber is obtained by melt spinning.
Claim 16
Dependent Claim
11 words
A monofilament obtained by extrusion of the copolymer of claim 1.
Claim 17
Dependent Claim
11 words
A monofilament obtained by extrusion of the copolymer of claim 7.
Claim 18
Dependent Claim
11 words
A monofilament obtained by extrusion of the copolymer of claim 8.
Claim 19
Dependent Claim
12 words
A yarn obtained by twisting fibers of the copolymer of claim 1.
Claim 20
Dependent Claim
12 words
A yarn obtained by twisting fibers of the copolymer of claim 7.
Claim 21
Dependent Claim
12 words
A yarn obtained by twisting fibers of the copolymer of claim 8.
Claim 22
Dependent Claim
12 words
A fabric obtained by weaving yarn of the copolymer of claim 1.
Claim 23
Dependent Claim
12 words
A fabric obtained by weaving yarn of the copolymer of claim 7.
Claim 24
Dependent Claim
12 words
A fabric obtained by weaving yarn of the copolymer of claim 8.
Claim 25
Dependent Claim
12 words
A fabric obtained by knitting yarn of the copolymer of claim 1.
Claim 26
Dependent Claim
12 words
A fabric obtained by knitting yarn of the copolymer of claim 7.
Claim 27
Dependent Claim
12 words
A fabric obtained by knitting yarn of the copolymer of claim 8.
Claim 28
Dependent Claim
12 words
A fabric obtained by knitting monofilament of the copolymer of claim 1.
Claim 29
Dependent Claim
12 words
A fabric obtained by knitting monofilament of the copolymer of claim 7.
Claim 30
Dependent Claim
12 words
A fabric obtained by knitting monofilament of the copolymer of claim 8.
Claim 31
Dependent Claim
11 words
A nonwoven fabric obtained by laminating the copolymer of claim 1.
Claim 32
Dependent Claim
11 words
A nonwoven fabric obtained by laminating the copolymer of claim 7.
Claim 33
Dependent Claim
11 words
A nonwoven fabric obtained by laminating the copolymer of claim 8.
Claim 34
Dependent Claim
8 words
A fiber comprising the copolymer of claim 1.
Claim 35
Dependent Claim
8 words
A fiber comprising the copolymer of claim 7.
Claim 36
Dependent Claim
8 words
A fiber comprising the copolymer of claim 8.
Claim 37
Dependent Claim
8 words
A monofilament comprising the copolymer of claim 1.
Claim 38
Dependent Claim
8 words
A monofilament comprising the copolymer of claim 7.
Claim 39
Dependent Claim
8 words
A monofilament comprising the copolymer of claim 8.
Claim 40
Dependent Claim
8 words
A yarn comprising the copolymer of claim 1.
Claim 41
Dependent Claim
8 words
A yarn comprising the copolymer of claim 7.
Claim 42
Dependent Claim
8 words
A yarn comprising the copolymer of claim 8.
Claim 43
Dependent Claim
8 words
A fabric comprising the copolymer of claim 1.
Claim 44
Dependent Claim
8 words
A fabric comprising the copolymer of claim 7.
Claim 45
Dependent Claim
8 words
A fabric comprising the copolymer of claim 8.
Claim 46
Dependent Claim
9 words
A nonwoven fabric comprising the copolymer of claim 1.
Claim 47
Dependent Claim
9 words
A nonwoven fabric comprising the copolymer of claim 7.
Claim 48
Dependent Claim
9 words
A nonwoven fabric comprising the copolymer of claim 8.
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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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |