US4601925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Race track cushioning surface
Assignee: Individual
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Filing: 1984-10-18
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Granted: 1986-07-22
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Expires: 2004-10-18
Abstract
Abstract The invention relates to a cushion for use on top of a hard paving material in a race track or playing field and comprises three rubber coated coconut husk fiber bodies superimposed on each other. The fibrous bodies are adhesively bonded to each other by rubber adhesive and the middle layer has the coconut fibers compressed to a lesser extent than the compression of the fibers in the upper and lower layers.
Inventors
- 👤 Samuel K. Hsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:56
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/02; A; A63; A63C; A63C19/00; A63C19/04; B32B7/00; B32B7/04; B32B7/12; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/048; B32B2307/00; B32B2307/50; B32B2307/56; B32B2419/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24992; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249948; Y10T428/31504; Y10T428/31826; Y10T428/31841; Y10T428/31971
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A cushion for use on top of a hard paving material in a race track or playing field consisting of three rubber-coated coconut husk fiber bodies superimposed on each other, each of said bodies comprising a mass of coconut husk fibers treated with rot resistant material and compressed into a carpet-like slab and natural rubber latex coating the coconut husk fibers and vulcanized to bond them together as a coherent flexible body, said superimposed bodies being adhesively bonded to each other by rubber adhesive to form a three layer cushion having an upper layer substantially one inch thick, a middle layer substantially one-half inch thick, and a lower layer substantially one inch thick, said middle layer having its coconut husk fibers compressed to a lesser extent than the compression of the fibers in said upper and lower layers.
Claim 2
Dependent Claim
138 words
A cushion for use on top of a hard paving material in a race track or playing field consisting of three rubber-coated coconut husk fiber bodies superimposed on each other, each of said bodies comprising a mass of coconut husk fibers treated with rot resistant material and compressed into a carpet-like slab and natural rubber latex coating the coconut husk fibers and vulcanized to bond them together as a coherent flexible body, said superimposed bodies being adhesively bonded to each other by rubber adhesive to form a three layer cushion having an upper layer substantially one inch thick, a middle layer substantially one-half inch thick, and a lower layer substantially one inch thick, said middle layer having its coconut husk fibers compressed to a lesser extent than the compression of the fibers in said upper and lower layers.
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) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |