US4199639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sandwich-structured double layer floor covering
Assignee: Individual
•
Filing: 1978-07-10
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Granted: 1980-04-22
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Expires: 1998-07-10
Abstract
Abstract Sandwich-structured double layer floor covering with the upper surface layer of fleece made of synthetic polymer fiber of at least 5 mm thickness having, on the upper surface, needle work of with a minimum of 2 million stitches per square meter, and with a lower layer of cellular polyethylene having a maximum density of 35 kilograms per cubic meter and a thickness of at least 5 millimeters. The combination of the two different layers and needling make it particularly suitable as a floor covering for sports-grounds especially with regard to sliding friction on the top surface and the shock-absorption property of the lower layer.
Inventors
- 👤 Walter Ronc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:17
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/245; A; A63; A63C; A63C19/00; A63C19/04; B32B27/00; B32B27/12; B32B3/00; B32B3/26; B32B3/30; B32B5/02; B32B5/022; B32B5/18; B32B7/00; B32B7/04; B32B7/12; E; E01; E01C; E01C13/00; E01C13/04; E01C13/045; B32B2250/00; B32B2250/02; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/025; B32B2305/00; B32B2305/72; B32B2307/00; B32B2307/50; B32B2307/554; B32B2307/70; B32B2307/712; B32B2307/72; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249977; Y10T428/26; Y10T428/261; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/666; Y10T442/667
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
Sandwich-structured double layer floor covering composed of A) an upper surface layer of fleece at least 5 millimeters thick made of synthetic polymer fiber with, said upper surface having a minimum needlework of 2 million stitches per square meter, and B) a lower layer of cellular polyethylene having closed cells and a density between 25 and 35 kilograms per cubic meter and a thickness of at least 5 millimeters, said upper layer and said lower layer being hot welded together without adhesive.
Claim 2
Dependent Claim
82 words
Sandwich-structured double layer floor covering composed of A) an upper surface layer of fleece at least 5 millimeters thick made of synthetic polymer fiber with, said upper surface having a minimum needlework of 2 million stitches per square meter, and B) a lower layer of cellular polyethylene having closed cells and a density between 25 and 35 kilograms per cubic meter and a thickness of at least 5 millimeters, said upper layer and said lower layer being hot welded together without adhesive.
Claim 3
Dependent Claim
30 words
Floor covering according to claim 1, wherein the lower layer made of cellular polyethylene has a thickness of 5.5 millimeters, and the upper surface layer a thickness of 6.0 millimeters.
Claim 4
Dependent Claim
23 words
Floor covering according to claim 1, wherein the lower layer made of cellular polyethylene has a density of about 30 kgs/m 3 .
Claim 5
Dependent Claim
16 words
Floor covering according to claim 1, wherein the lower layer made of cellular polyethylene is perforated.
Claim 6
Dependent Claim
28 words
Floor covering according to claim 4, wherein the diameter of each perforation is 4 to 5 millimeters and the distance between the perforations is 20 to 30 millimeters.
Claim 7
Dependent Claim
25 words
Floor covering according to claim 1 or 4, wherein the upper surface layer of fleece has needlework of 3 million stitches per m 2 .
Claim 8
Dependent Claim
17 words
Floor covering according to claim 1, wherein the fibers in the upper layer are made of polypropylene.
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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) | 1983-04-22 | 1983-10-22 | 1984-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-22 | 1987-10-22 | 1988-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-22 | 1991-10-22 | 1992-04-22 | $7700.00 | Window Closed / Lapsed |