Patent US2914763A successfully refreshed from Google Patents.
US4138519A
Expired / Lapsed
US
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Conductive secondary backings and tufted carpets made therewith
Assignee: BP Corp North America Inc
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Filing: 1977-09-06
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Granted: 1979-02-06
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Expires: 1997-09-06
Abstract
Abstract Secondary backing for a tufted carpet comprising a fabric with an open construction having an air permeability preferably of at least about 350 cfm of a synthetic yarn and a conductive spun yarn wherein said spun yarn comprises a conductive core fiber having a denier in the range of about 15 to about 25 and a maximum resistance of about 1 × 10 10 ohms/centimeter around which core fiber is spun a nonconductive support fiber having a denier in the range of about 3 to 18. The conductive spun yarn can be in the warp and/or weft direction of said backing at an apparent weight density of conductive fiber as low as 0.6 grams/square meter and still dissipate a static charge to a value in kilovolts below about 4.5.
Inventors
- 👤 Philip B. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:30
CPC Classifications
D; D03; D03D; D03D15/00; D03D15/50; D03D15/533; D06; D06N; D06N7/00; D06N7/0063; D06N7/0071; D06N7/0081; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T442/00; Y10T442/30; Y10T442/3065; Y10T442/3073
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
A conductive secondary backing suitable for use in a tufted carpet comprising a fabric with an open construction of synthetic yarns and a conductive spun yarn, wherein said spun yarn comprises a conductive core fiber having a denier in the range of about 15 to about 25 and a maximum resistance of about 1 × 10 10 ohms/centimeter around which is spun a nonconductive fiber having a denier in the range of about 3 to 18 with a twist of at least about 13/4 twists per inch.
Claim 2
Dependent Claim
87 words
A conductive secondary backing suitable for use in a tufted carpet comprising a fabric with an open construction of synthetic yarns and a conductive spun yarn, wherein said spun yarn comprises a conductive core fiber having a denier in the range of about 15 to about 25 and a maximum resistance of about 1 × 10 10 ohms/centimeter around which is spun a nonconductive fiber having a denier in the range of about 3 to 18 with a twist of at least about 13/4 twists per inch.
Claim 3
Dependent Claim
44 words
The conductive secondary backing of claim 1, wherein said conductive spun yarn is in one of a warp and a weft direction and the backing has an air permeability of at least about 350 cubic feet per minute as measured according to ASTM D-737-46.
Claim 4
Dependent Claim
15 words
A tufted carpet having a secondary backing comprising the conductive secondary backing of claim 2.
Claim 5
Dependent Claim
25 words
The conductive secondary backing of claim 1, wherein said open construction is selected from the group consisting of a leno, basket, twill, and knit construction.
Claim 6
Dependent Claim
15 words
A tufted carpet having a secondary backing comprising the conductive secondary backing of claim 4.
Claim 7
Dependent Claim
15 words
A tufted carpet having a secondary backing comprising the conductive secondary backing of claim 1.
Claim 8
Dependent Claim
142 words
A conductive secondary backing suitable for use in a tufted carpet comprising a fabric having an end by pick count in the range of about 12 to 30 by about 6 to 20 and a synthetic yarn fiber in the warp direction with denier in the range of about 350 to 1000 and a synthetic yarn fiber in the weft direction with denier in the range of about 1200 to 2500 and a conductive spun yarn, wherein said spun yarn comprises a conductive core fiber having a denier in the range of about 15 to about 24 and a maximum resistance of about 1 × 10 10 ohms/centimeter as measured according to TPM-73-3 around which is spun a nonconductive fiber having a denier in the range of about 3 to 18 with a twist of at least about 13/4 twists per inch.
Claim 9
Dependent Claim
142 words
A conductive secondary backing suitable for use in a tufted carpet comprising a fabric having an end by pick count in the range of about 12 to 30 by about 6 to 20 and a synthetic yarn fiber in the warp direction with denier in the range of about 350 to 1000 and a synthetic yarn fiber in the weft direction with denier in the range of about 1200 to 2500 and a conductive spun yarn, wherein said spun yarn comprises a conductive core fiber having a denier in the range of about 15 to about 24 and a maximum resistance of about 1 × 10 10 ohms/centimeter as measured according to TPM-73-3 around which is spun a nonconductive fiber having a denier in the range of about 3 to 18 with a twist of at least about 13/4 twists per inch.
Claim 10
Dependent Claim
15 words
A tufted carpet having a secondary backing comprising the conductive secondary backing of claim 7.
References Cited (Backward Citations)
US3309259A
Cited
US3475898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |