Patent US5189833A successfully refreshed from Google Patents.
US5189833A
Expired / Lapsed
US
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Turf-growing process
Assignee: BUTT CONJETTA M
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Filing: 1992-03-09
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Granted: 1993-03-02
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Expires: 2012-03-09
Abstract
Abstract A process for growing a light-weight, transportable sod-mat and for facilitating the implantation of such a mat on a lawn bed comprises germinating lawn-grass seeds in a thin layer of growing medium spread over a mat of non-woven polypropylene laying on an impermeable membrane. After germination, the mat and the inseminated growing medium is installed over a layer of porous material such as decomposed granite covering a conditioned subsoil. Drip irrigation lines are run through the upper region of the porous material.
Inventors
- 👤 Edward H. Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:12
CPC Classifications
A; A01; A01G; A01G20/00; A01G20/20; Y; Y10; Y10S; Y10S47/00; Y10S47/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
80 words
A turf-growing process which comprises: covering a flat surface with an impermeable membrane; placing a porous mat over said membrane; spreading a growing medium to a thickness of at least 3 millimeters over said mat; inseminating said medium with grass seeds; keeping said medium moist through germination of said seeds; preparing a lawn bed; lifting said mat from said membrane; and wherein said step of placing a porous mat comprises selecting a sheet of non-woven spun bonded polymer fiber matting.
Claim 2
Dependent Claim
80 words
A turf-growing process which comprises: covering a flat surface with an impermeable membrane; placing a porous mat over said membrane; spreading a growing medium to a thickness of at least 3 millimeters over said mat; inseminating said medium with grass seeds; keeping said medium moist through germination of said seeds; preparing a lawn bed; lifting said mat from said membrane; and wherein said step of placing a porous mat comprises selecting a sheet of non-woven spun bonded polymer fiber matting.
Claim 3
Dependent Claim
24 words
The process of claim 1, wherein said porous mat is a polypropylene matting having a weight of at least 60 grams per square millimeter.
Claim 4
Dependent Claim
22 words
The process of claim 2, wherein said polypropylene matting has a coefficient of permeability of no more than 0.07 centimeter per second.
Claim 5
Dependent Claim
22 words
The process of claim 3, wherein said polypropylene matting has a coefficient of permeability of no less than 0.04 centimeter per second.
Claim 6
Dependent Claim
19 words
The process of claim 3, wherein said polypropylene matting has a equivalent sieve of no less than 0.5 milimeter.
Claim 7
Dependent Claim
23 words
The process of claim 1, wherein the step of spreading a growing medium comprises spreading a mixture of peat moss and paper mulch.
Claim 8
Dependent Claim
33 words
The process of claim 1, wherein the step of preparing a lawn bed comprises: building a layer of amended soil; and piling a stratum of porous minerals atop said layer of amended soil.
Claim 9
Dependent Claim
28 words
The process of claim 7, wherein the step of building a layer of amended soil comprises stacking conditioned top soil to a height of at least 15 centimeters.
Claim 10
Dependent Claim
29 words
The process of claim 7, wherein the step of preparing a lawn bed further comprises running drip irrigation lines in an upper region of said stratum of porous material.
Claim 11
Dependent Claim
26 words
The process of claim 7, wherein the step of piling a stratum of porous material comprises accumulating a layer of sand at least 5 centimeters high.
Claim 12
Dependent Claim
27 words
The process of claim 7, wherein the step of piling a stratum of porous material comprises accumulating a layer of decomposed granite at least 5 centimeters high.
Claim 13
Dependent Claim
23 words
The process of claim 1, wherein the step of covering a flat surface comprises covering said surface with a black film of polyvinyl.
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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) | 1996-03-01 | 1996-08-31 | 1997-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-01 | 2000-08-31 | 2001-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-01 | 2004-08-31 | 2005-03-02 | $7700.00 | Window Closed / Lapsed |