Patent US3944452A successfully refreshed from Google Patents.
US3944452A
Expired / Lapsed
US
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Artificial turf preparation
Assignee: Chevron USA Inc
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Filing: 1974-05-29
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Granted: 1976-03-16
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Expires: 1994-05-29
Abstract
Abstract A process for field preparation of a fibrous turf on a surface by steps including: (a) inserting fibers into a backing to obtain a backing with inserted fibers; (b) laying a receiving matrix on the surface; (c) bringing a portion of the backing with inserted fibers into connection with the receiving matrix so as to immerse the inserted fibers in the matrix; and (d) maintaining said portion of the backing stationary for a sufficient period of time so that the fibers will stay in the matrix upon removing the backing from the fibers. Preferably the receiving matrix is a thermoplastic substance comprising sulfur, especially plasticized sulfur.
Inventors
- 👤 William G. Toland
- 👤 Quentin T. Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:56
CPC Classifications
D; D04; D04H; D04H11/00; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/23993
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
172 words
A process for continuous field preparation of a fibrous turf on the ground using a wheeled vehicle which is moved forward at a ground speed and which has a continuous rotatable belt operably connected to the vehicle, which process comprises: a. inserting fibers into the continuous rotatable belt, the belt being adapted to have fibers inserted therein, to obtain a belt with inserted fibers; b. laying a receiving matrix on the ground; c. bringing a portion of the belt with inserted fibers into connection with the receiving matrix as the vehicle moves forward so as to immerse the inserted fibers in the matrix; d. operating the belt member of the moving vehicle similar to a tank tread; and e. maintaining said portion of the belt in zero relative velocity to the ground, by rotating the belt by drive wheels at a speed equal to the ground speed of said vehicle, for a sufficient period of time so that the fibers will stay in the matrix upon removing the backing from the fibers.
Claim 2
Dependent Claim
172 words
A process for continuous field preparation of a fibrous turf on the ground using a wheeled vehicle which is moved forward at a ground speed and which has a continuous rotatable belt operably connected to the vehicle, which process comprises: a. inserting fibers into the continuous rotatable belt, the belt being adapted to have fibers inserted therein, to obtain a belt with inserted fibers; b. laying a receiving matrix on the ground; c. bringing a portion of the belt with inserted fibers into connection with the receiving matrix as the vehicle moves forward so as to immerse the inserted fibers in the matrix; d. operating the belt member of the moving vehicle similar to a tank tread; and e. maintaining said portion of the belt in zero relative velocity to the ground, by rotating the belt by drive wheels at a speed equal to the ground speed of said vehicle, for a sufficient period of time so that the fibers will stay in the matrix upon removing the backing from the fibers.
Claim 3
Dependent Claim
15 words
A process in accordance with claim 1 wherein the receiving matrix is a thermoplastic substance.
Claim 4
Dependent Claim
14 words
A process in accordance with claim 2 wherein the thermoplastic substance comprises plasticized sulfur.
Claim 5
Dependent Claim
23 words
A process in accordance with claim 3 wherein the plasticized sulfur comprises sulfur, a sulfur plasticizing agent, glass fiber and a thixotropic agent.
Claim 6
Dependent Claim
16 words
A process in accordance with claim 4 wherein the plasticized sulfur also contains an inert filler.
Claim 7
Dependent Claim
36 words
A process in accordance with claim 3 wherein the plasticized sulfur comprises, by weight, about 65 to 97% sulfur, about 1 to 7% dicyclopentadiene, about 1 to 5% glass fiber, and about 1 to 15% talc.
Claim 8
Dependent Claim
43 words
A process in accordance with claim 2 wherein the fibers inserted as per step (a) are continuous fibers and wherein prior to step (c) the fibers are cut to a length suitable for implantation into the thermoplastic substance to obtain a fibrous turf.
Claim 9
Dependent Claim
26 words
A process in accordance with claim 7 wherein the thermoplastic substance is plasticized sulfur comprising sulfur, a sulfur plasticizing agent, glass fiber, and a thixotropic agent.
References Cited (Backward Citations)
US3183143A
Cited
US3444017A
Cited
US3477889A
Cited
US3332828A
Cited
US3453125A
Cited
US3674525A
Cited
US3723213A
Cited
US3676166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |