US4735825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying and bonding free-flowing bulb material to artificial grass
Assignee: JF Adolff AG
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Filing: 1987-07-15
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Granted: 1988-04-05
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Expires: 2007-07-15
Abstract
Abstract The invention relates to an artificial grass, in particular for sports and playing areas, having a filling of free-flowing bulk material, in particular sand, provided between its pile threads such that the free ends of the pile threads project above the filling. According to the invention, the filling is fixed in relation to the pile threads by a bonding agent.
Inventors
- 👤 Hans J. Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:18
CPC Classifications
D; D04; D04H; D04H11/00; E; E01; E01C; E01C13/00; E01C13/08; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
122 words
A method of producing a pre-formed artificial grass including the steps of: (a) mixing a free-flowing bulk material with a bonding agent, (b) distributing the resulting mixture of free-flowing bulk material and curable bonding agent between the upwardly projecting pile threads of a base mat as a filling whereby the pile threads project above said filling, and (c) subjecting said curable bonding agent, mat and filling to a curing condition for said bonding agent whereby said bonding agent secures said bulk material to said upwardly projecting threads and said artificial grass may be rolled after fabrication at a site of manufacture for transport to a site of use and unrolled at said site of use substantially without loss of said bulk material.
Claim 2
Independent Claim
122 words
A method of producing a pre-formed artificial grass including the steps of: (a) mixing a free-flowing bulk material with a bonding agent, (b) distributing the resulting mixture of free-flowing bulk material and curable bonding agent between the upwardly projecting pile threads of a base mat as a filling whereby the pile threads project above said filling, and (c) subjecting said curable bonding agent, mat and filling to a curing condition for said bonding agent whereby said bonding agent secures said bulk material to said upwardly projecting threads and said artificial grass may be rolled after fabrication at a site of manufacture for transport to a site of use and unrolled at said site of use substantially without loss of said bulk material.
Claim 3
Dependent Claim
13 words
The method of claim 1 in which said free-flowing bulk material comprises sand.
References Cited (Backward Citations)
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US4044179A
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US4389435A
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US4337283A
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US4444815A
Cited
US4396653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |