US4769277A
Expired / Lapsed
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Substratum for soil-free cultivation
Assignee: Saint Gobain Recherche SA
•
Filing: 1986-05-07
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Granted: 1988-09-06
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Expires: 2006-05-07
Abstract
Abstract Substrata for soil-free cultivation are characterized by a relatively low by-volume mass. They are also constituted of fine fibers. The substrata present the advantage of a high degree of water retention, even for small thicknesses.
Inventors
- 👤 Jean-Paul Meunier, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:02
CPC Classifications
A; A01; A01G; A01G24/00; A01G24/10; A01G24/18; A01G31/00; A01G24/40; A01G24/44; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/249921; Y10T442/00; Y10T442/50
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
34 words
A substratum for soil-free cultivation formed of a mineral fiber felt whose by-volume mass is less than 50 kgm -3 of which at least one of the surfaces is covered with a water-proof sheet.
Claim 2
Dependent Claim
34 words
A substratum for soil-free cultivation formed of a mineral fiber felt whose by-volume mass is less than 50 kgm -3 of which at least one of the surfaces is covered with a water-proof sheet.
Claim 3
Dependent Claim
17 words
The substratum of claim 1, wherein the by-volume mass is between 15 and 40 kgm -3 .
Claim 4
Dependent Claim
17 words
The substratum of claim 1, wherein the average diameter of said fibers is less than 8 μm.
Claim 5
Dependent Claim
17 words
The substratum of claim 2, wherein the average diameter of said fibers is less than 8 μm.
Claim 6
Dependent Claim
18 words
The substratum of claim 3, wherein the average diameter of said fibers is between 2 and 6 μm.
Claim 7
Dependent Claim
18 words
The substratum of claim 4, wherein the average diameter of said fibers is between 2 and 6 μm.
Claim 8
Dependent Claim
13 words
The substratum of claim 1, whose thickness is between 10 and 40 mm.
Claim 9
Dependent Claim
11 words
The substratum of claim 1, comprised of a glass fiber felt.
Claim 10
Dependent Claim
15 words
The substratum of claim 1, having an available water reserve which is not under 40%.
Claim 11
Dependent Claim
15 words
The substratum of claim 9, wherein said available water reserve is not less than 50%.
Claim 12
Dependent Claim
12 words
The substratum of claim 8, which does not contain a surface-active agent.
Claim 13
Dependent Claim
17 words
The substratum of claim 11, in which the average diameter of said fibers is under 4.5 μm.
Claim 14
Dependent Claim
13 words
The substratum of claim 1, whose thickness is not greater than 30 mm.
Claim 15
Dependent Claim
16 words
The substratum of claim 1, wherein said mineral fibers are bound with an organic bonding material.
Claim 16
Dependent Claim
28 words
The substratum of claim 14, wherein said organic bonding material is a phenolic plastic resin present in an amount of 2 to 3% by weight of the substratum.
Claim 17
Dependent Claim
15 words
The substratum of claim 1, wherein said mineral fibers are impregnated with a surface-active agent.
Claim 18
Dependent Claim
13 words
The substratum of claim 16, wherein said surface-active agent is a non-ionic agent.
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) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |