Patent EP0136747A1 successfully refreshed from Google Patents.
EP0136747A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of providing a substructure for an artificial grass field and artificial grass field applied to such a substructure
Assignee: Wegenbouwmaatschappij J Heijmans BV
•
Filing: 1984-08-28
•
Granted: —
•
Expires: 2004-08-28
Abstract
Abstract A method of constructing a substructure for an artificial grass field by depositing a foundation on an available layer of sand or a layer of sand applied in which the foundation is composed of a mixing of material containing unbroken sand with at least 1% by weight of fibrous material.
Inventors
- 👤 Josephus Cornelis Heerkens
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 13:56
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/08; E01C13/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A method of constructing a substructure for an artificial grass field by depositing a foundation on an available layer of sand or a layer of sand applied characterized in that the foundation is composed of a mixing of material containing unbroken sand with at least 1 % by weight of fibrous material.
Claim 2
Independent Claim
52 words
A method of constructing a substructure for an artificial grass field by depositing a foundation on an available layer of sand or a layer of sand applied characterized in that the foundation is composed of a mixing of material containing unbroken sand with at least 1 % by weight of fibrous material.
Claim 3
Dependent Claim
29 words
A method as claimed in Claim 1 characterized in that at least 95 % by weight of the sand has a grain size distribution of 0.2 to 0.6 mm.
Claim 4
Independent Claim
24 words
A method as claimed in Claims 1 to 2 characterized in that the foundation contains 3 to 7 % by weight of fibrous material.
Claim 5
Independent Claim
34 words
A method as claimed in Claims 1 to 3 characterized in that the fibrous material is chosen among organic fibres such as polypropylene fibres or Nylon fibres or inorganic fibres such as glass fibres.
Claim 6
Dependent Claim
28 words
A method as claimed in Claim 4 characterized in that the fibres have a length of 6 to 10 mms and a thickness of 5 to 15 ums.
Claim 7
Independent Claim
27 words
A method as claimed in Claims 1 to 5 characterized in that apart from the fibrous material an amount of broken sand is provided in the foundation.
Claim 8
Dependent Claim
51 words
An artificial grass field comprising an upper layer of artificial grass fibres arranged in a mat deposited on a substructure, in which as the case may be a layer of sand is applied between the artificial grass fibres characterized in that the substructure is composed as described in Claims-1 to 6.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.