US3786011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride resin composition closely simulating a grass playing surface in its bounce characteristics
Assignee: Coal Industry Patents Ltd
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Filing: 1971-06-01
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Granted: 1974-01-15
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Expires: 1991-06-01
Abstract
Abstract A SYNTHETIC PITCH OR FIELD FOR CRICKET, TENNIS, AND LIKE BALL GAMES IS PROVIDED, WHICH, IN CONTACTS TO PREVIOUS PROPOSED PITCHES, CLOSELY SIMULATES GRASS, PARTICULARLY IN ITS BOUNCES CHARACTERISTICS, ESPECIALLY FOR SPINNING BALLS. THE SYNTHETIC PITCH OR FIRELD CONTAINS 25% TO 75% OF LASTICIZED POLYVINYL CHLORIDE MATERIAL, 5% TO 20% OF A FINELY DIVINDED FIBROUS MATERIAL, 0% TO 20% OF A NATURAL OR SYNTHETIC RUBBER, PREFERABLY A NITRILE RUBBER, AND 10% TO 60% OF A FINELY DIVIDED, PREFERABLY LOW DENSITY FILLER, FOR EXAMPLE CHALK AND CLAY, AND MAY ALSO CONTAIN A GREEN PIGMENT.
Inventors
- 👤 D Price
- 👤 R Moore
- 👤 R Sidebottom
- 👤 M Briscoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:17
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/04; E01C13/045; C; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C08K3/18; C08K3/24; C08K3/26; C08K5/00; C08K5/04; C08K5/10; C08K7/00; C08K7/02; C08L; C08L11/00; C08L21/00; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L67/00; C08L67/02; C08L9/00; C08L9/02; C08L9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |