US5041320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surfacing composition
Assignee: Hepworth Minerals and Chemicals Ltd
•
Filing: 1989-01-03
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Granted: 1991-08-20
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Expires: 2009-01-03
Abstract
Abstract A sports surface comprises a pile fabric (11) and a layer of coated grains (13) in which the pile is partly submerged. The grains are of sand coated with a rubber.
Inventors
- 👤 William C. S. Meredith
- 👤 Martin J. Luxton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:53
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/06; E01C13/065; E01C13/08; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23921; Y10T428/23943; Y10T428/25; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2998
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
A sports surface comprising, in combination: a pile fabric including a backing and an upstanding pile attached to the backing; and a layer of loose mineral grains separately coated with an elastomeric material deposited on said backing to a depth wherein said upstanding pile is at least partially submerged therein.
Claim 2
Dependent Claim
50 words
A sports surface comprising, in combination: a pile fabric including a backing and an upstanding pile attached to the backing; and a layer of loose mineral grains separately coated with an elastomeric material deposited on said backing to a depth wherein said upstanding pile is at least partially submerged therein.
Claim 3
Dependent Claim
19 words
A surface according to claim 1 wherein the mean of the largest dimensions of the grains exceeds 100 micron.
Claim 4
Dependent Claim
25 words
A surface according to claim 1 wherein the weight of the coating is within the range 0.2% to 10% of the weight of the grains.
Claim 5
Independent Claim
83 words
A method of constructing a sports surface comprising the steps of: providing a pile fabric having an upstanding pile of fibrous material; coating separate mineral grains with a substantially liquid polymeric composition; solidifying the liquid polymeric composition to form a dry elastomeric coating on the separate mineral grains; and depositing a layer of said coated mineral grains on said pile fabric wherein the fibrous material of the pile is at least partially submerged and remains upstanding in said layer of coated mineral grains.
Claim 6
Independent Claim
83 words
A method of constructing a sports surface comprising the steps of: providing a pile fabric having an upstanding pile of fibrous material; coating separate mineral grains with a substantially liquid polymeric composition; solidifying the liquid polymeric composition to form a dry elastomeric coating on the separate mineral grains; and depositing a layer of said coated mineral grains on said pile fabric wherein the fibrous material of the pile is at least partially submerged and remains upstanding in said layer of coated mineral grains.
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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) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |