US4201812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous carpet backing
Assignee: Shell USA Inc
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Filing: 1979-06-18
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Granted: 1980-05-06
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Expires: 1999-06-18
Abstract
Abstract Fibrous floor coverings comprising a layer of fibrous fabric having an integral backing layer are disclosed. The backing layer comprises the blend of a certain bituminous component and a monoalkenyl arene/conjugated diene block copolymer.
Inventors
- 👤 Thomas C. Blanken
- 👤 Joannes C. A. Schellekens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:45
CPC Classifications
C; C08; C08L; C08L95/00; D; D06; D06N; D06N7/00; D06N7/0063; D06N7/0071; D06N7/0073; D06N2203/00; D06N2203/04; D06N2203/045; D06N2203/047; D06N2203/08; D06N2209/00; D06N2209/16; D06N2209/1628; D06N2211/00; D06N2211/06; D06N2211/066; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/23986; Y10T428/23993; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/668
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
A fibrous floor covering comprising a layer of a fibrous fabric having an integral backing layer, said backing layer comprising the blend of: (a) from about 50 to about 95 percent of a bituminous component having a penetration of below about 30 (0.1 mm) at 25° C., and (b) from about 5 to about 50% by weight of a block copolymer having at least two monoalkenyl arene polymer end blocks A and at least one elastomeric conjugated diene mid block B.
Claim 2
Dependent Claim
81 words
A fibrous floor covering comprising a layer of a fibrous fabric having an integral backing layer, said backing layer comprising the blend of: (a) from about 50 to about 95 percent of a bituminous component having a penetration of below about 30 (0.1 mm) at 25° C., and (b) from about 5 to about 50% by weight of a block copolymer having at least two monoalkenyl arene polymer end blocks A and at least one elastomeric conjugated diene mid block B.
Claim 3
Dependent Claim
25 words
The fibrous floor covering of claim 1 wherein said bitumen is selected from the group consisting of propane bitumens, blown propane bitumens and mixtures thereof.
Claim 4
Dependent Claim
25 words
The fibrous floor covering of claim 1 wherein said bitumen has a penetration of from about 1 to about 25 (0.1 mm) at 25° C.
Claim 5
Dependent Claim
31 words
The fibrous floor covering according to claim 1 wherein the bituminous component also contains from 0.1 to 75 percent by weight based on the weight of the bitumen of a wax.
Claim 6
Dependent Claim
21 words
The fibrous floor covering according to claim 1 wherein the wax has a congealing point of from 50° to 70° C.
Claim 7
Dependent Claim
40 words
The fibrous floor covering according to claim 1 wherein the polymer blocks A of the block copolymer have a molecular weight of from 2,000 to 125,000 and the polymer block B has a molecular weight of from 15,000 to 250,000.
Claim 8
Dependent Claim
17 words
The fibrous floor covering according to claim 6 wherein the block copolymer is a polystyrene-polybutadiene-polystyrene block copolymer.
Claim 9
Dependent Claim
30 words
The fibrous floor covering according to claim 1 wherein the amount of bituminous component is from 74 to 90%w and the amount of block copolymer is from 5 to 50%w.
Claim 10
Dependent Claim
17 words
The fibrous floor covering according to claim 1 wherein the backing layer also contains an inorganic filler.
Claim 11
Dependent Claim
24 words
The fibrous floor covering according to claim 9 wherein the filler is selected from the group consisting of slate dust, limestone or mixtures thereof.
Claim 12
Dependent Claim
30 words
The fibrous floor covering according to claim 10 wherein the amount of filler is from 1 to 400%w based on the total weight of the bituminous component and block copolymer.
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) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |