Patent US4069361A successfully refreshed from Google Patents.
US4069361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Woven carpet backing with fused staple fiber needled layer
Assignee: Van Dorn Co
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Filing: 1975-08-20
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Granted: 1978-01-17
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Expires: 1995-08-20
Abstract
Abstract This invention concerns an improved shear resistant backing for pile fabrics prepared by needling a batt of staple fiber into a woven fabric of polypropylene yarn of continuous filaments or ribbons and then bonding the structure by fusion of the staple fiber of the batt.
Inventors
- 👤 Vijayendra Kumar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:34
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; D; D05; D05C; D05C17/00; D05C17/02; B32B5/02; B32B5/024; B32B5/06; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/0276; B32B2307/00; B32B2307/70; B32B2307/718; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T442/00; Y10T442/30; Y10T442/3707; Y10T442/3724
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
41 words
An improved shear-resistant backing for pile fabrics prepared by needling a batt of staple fiber into a woven fabric of polypropylene yarn of continuous filaments or ribbons and then bonding the structure by fusion of the staple fiber of the batt.
Claim 2
Dependent Claim
41 words
An improved shear-resistant backing for pile fabrics prepared by needling a batt of staple fiber into a woven fabric of polypropylene yarn of continuous filaments or ribbons and then bonding the structure by fusion of the staple fiber of the batt.
Claim 3
Dependent Claim
11 words
The backing of claim 1 wherein the staple fiber is polypropylene.
Claim 4
Dependent Claim
12 words
The backing of claim 1 wherein the staple fiber is a copolyester.
Claim 5
Dependent Claim
11 words
The backing of claim 1 wherein the batt is heat bonded.
Claim 6
Dependent Claim
34 words
The backing of claim 1 wherein the woven fabric of polypropylene has a weight of from 2 to 4 oz/yd 2 and the staple fiber batt weighs from 0.5 to 3 oz/yd 2 .
Claim 7
Dependent Claim
16 words
A shear-resistant pile fabric comprising the backing of claim 1 and having pile yarn tufted therethrough.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |