US3890739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of producing grass carpets
Assignee: Individual
•
Filing: 1973-08-15
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Granted: 1975-06-24
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Expires: 1993-08-15
Abstract
Abstract In a method of producing a grass carpet, a water impermeable sheet formed with a plurality of apertures is placed directly on a root impermeable surface and a mixture of grass seed and compost laid on top of the sheet. The size of the apertures is such that seed is unable to pass through the apertures. Preferably the sheet is a perforated plastic sheet and the root impermeable surface is a sheet of plastics material.
Inventors
- 👤 Jack Blackburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
A; A01; A01G; A01G20/00; A01G20/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
A method of producing a grass carpet comprising laying directly on a root impermeable surface a sheet of water impermeable material formed with a plurality of apertures, spreading grass seed and growing material such as soil, humus, compost, on top of the sheet, the size and shape of the apertures in the sheet being such that said seed and material is prevented from passing through the apertures, and applying water to the growing material.
Claim 2
Independent Claim
74 words
A method of producing a grass carpet comprising laying directly on a root impermeable surface a sheet of water impermeable material formed with a plurality of apertures, spreading grass seed and growing material such as soil, humus, compost, on top of the sheet, the size and shape of the apertures in the sheet being such that said seed and material is prevented from passing through the apertures, and applying water to the growing material.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein the sheet is perforated plastics sheeting.
Claim 4
Dependent Claim
17 words
A method according to claim 1 wherein the root impermeable surface comprises a sheet of impermeable material.
Claim 5
Dependent Claim
15 words
A method according to claim 3 wherein both the first and second sheets are light-proof.
Claim 6
Dependent Claim
24 words
A method according to claim 1 in which the grass seed is spread directly on the sheet and is covered with the growing material.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |