Patent US1655535A successfully refreshed from Google Patents.
Patent US3740303A successfully refreshed from Google Patents.
US3740303A
Expired / Lapsed
US
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Artificial playing surface
Assignee: EIDP Inc
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Filing: 1971-01-11
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Granted: 1973-06-19
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Expires: 1991-01-11
Abstract
Abstract AN ARTIFICIAL PLAYING SURFACE IS PROVIDED WHICH COMPRISES AN ARTIFICIAL GRASS LAYER HAVING THE CONJUNCTION THEREWITH BONDED BATT COMPRISING SYNTHETIC FIBERS, SAID BATT HAVING A DENSITY BETWEEN 1.88 AND 3.75 POUNDS PR CUBIC FOOT AND A THICKNESS BETWEEN 3/8 INCH AND 3/4 INCH. THESE IN TURN ARE ADHERED TO A WELL-DRAINED FOUNDATION. THE ARTIFICIAL GRASS LAYER AND BATT COMPOSITE COMPRISES A MAT SUITABLE FOR THE FORMATION OF THE BOVE-DESCRIBED SURFACE.
Inventors
- 👤 T Alderson
- 👤 J Newnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:51
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/08; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986; Y10T428/23993
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |