Patent US4242393A successfully refreshed from Google Patents.
US4242393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carpet tiles
Assignee: HEUGA ROHSAG AG
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Filing: 1979-02-07
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Granted: 1980-12-30
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Expires: 1999-02-07
Abstract
Abstract An improved backing for carpet or carpet tiles is provided in which a bitumen is filled with a limestone-type filler. Carpet and carpet tiles incorporating the filled bitumen are cheaper to produce, less brittle and more fire resistant than conventional carpet or carpet tiles. Because of the nature of the filled bitumen when in a fluid state, the process for manufacturing carpet or carpet tiles of the invention differs from conventional processes.
Inventors
- 👤 Willem H. L. Leupen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:06
CPC Classifications
C; C08; C08L; C08L95/00; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; D; D06; D06N; D06N7/00; D06N7/0063; D06N7/0071; D06N2203/00; D06N2203/08; D06N2205/00; D06N2205/10; D06N2209/00; D06N2209/06; D06N2209/067; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/23993
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A carpet or carpet tile comprising a carpet, a secondary backing sheet and a layer of a backing composition which comprises an admixture with bitumen of a limestone-type filler comprising particles all of wich are less than 1 mm, 10% to 50% by weight of which are between 1 mm and 77μ and 90% to 50% of which are less than 77μ, the combination of filler and bitumen having a ball and ring softening point of 373 K to 403 K and a penetration of 5 to 25 points.
Claim 2
Dependent Claim
89 words
A carpet or carpet tile comprising a carpet, a secondary backing sheet and a layer of a backing composition which comprises an admixture with bitumen of a limestone-type filler comprising particles all of wich are less than 1 mm, 10% to 50% by weight of which are between 1 mm and 77μ and 90% to 50% of which are less than 77μ, the combination of filler and bitumen having a ball and ring softening point of 373 K to 403 K and a penetration of 5 to 25 points.
Claim 3
Dependent Claim
33 words
A carpet or carpet tile according to claim 1 wherein said filler is present in an amount of between 10% and 90% by weight based on the total weight of said backing composition.
Claim 4
Dependent Claim
31 words
A carpet or carpet tile according to claim 2 further comprising alumina tri-hydrate in an amount of up to 10% by weight based on the total weight of said backing composition.
Claim 5
Dependent Claim
31 words
A carpet or carpet tile according to claim 1 further comprising alumina tri-hydrate in an amount of up to 10% by weight based on the total weight of said backing composition.
Claim 6
Dependent Claim
114 words
In a process for manufacturing carpet or carpet tiles, the improvement comprising admixing a bitumen and a limestone-type filler which comprises particles all of which are less than 1 mm, 10% to 50% by weight of which are between 1 mm and 77μ, and 90% to 50% by weight of which are less than 77μ, to form a filled bitumen having a ball and ring softening point of 373 K to 403 K and a penetration of 5 to 25 points, applying a layer of said filled bitumen while fluid to one surface of a secondary backing sheet which is conventional in the art, and pressing the underside of a carpet to said layer.
Claim 7
Dependent Claim
114 words
In a process for manufacturing carpet or carpet tiles, the improvement comprising admixing a bitumen and a limestone-type filler which comprises particles all of which are less than 1 mm, 10% to 50% by weight of which are between 1 mm and 77μ, and 90% to 50% by weight of which are less than 77μ, to form a filled bitumen having a ball and ring softening point of 373 K to 403 K and a penetration of 5 to 25 points, applying a layer of said filled bitumen while fluid to one surface of a secondary backing sheet which is conventional in the art, and pressing the underside of a carpet to said layer.
Claim 8
Dependent Claim
28 words
The process according to claim 5 further comprising admixing up to 10% by weight based on the weight of said filled bitumen of alumina tri-hydrate with said filler.
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) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |