Patent US3577894A successfully refreshed from Google Patents.
US3577894A
Expired / Lapsed
US
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Playing court
Assignee: Individual
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Filing: 1969-01-28
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Granted: 1971-05-11
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Expires: 1989-01-28
Abstract
Abstract This patent discloses a playing court which resembles turf in feel and in which the upper surface of the court dries extremely rapidly to permit the court to be used immediately after a rain.
Inventors
- 👤 Dean Emerson Jr
- 👤 Sidney B Wood Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:55
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/08; E01C13/02; E01C13/04; E01C13/045
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, drainage means on said base, said means having drainage channels open to receive water from above said means and extending generally parallel to the base over substantially the entire court to drain water from the court to at least one edge thereof, and an abrasive resistant flexible permeable layer overlying said means, at least one of said drainage means and said permeable layer providing a resilient cushion.
Claim 2
Dependent Claim
82 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, drainage means on said base, said means having drainage channels open to receive water from above said means and extending generally parallel to the base over substantially the entire court to drain water from the court to at least one edge thereof, and an abrasive resistant flexible permeable layer overlying said means, at least one of said drainage means and said permeable layer providing a resilient cushion.
Claim 3
Dependent Claim
66 words
A playing court comprising, a base of substantially rigid materIal sloped relative to the horizontal, resilient cushion means of cellular plastic over the entire base, said cushion means having formed in its entire upper surface drainage channels extending generally parallel to the base to drain water from the court to at least one edge thereof, and an abrasive resistant flexible permeable element over said cushion means.
Claim 4
Dependent Claim
66 words
A playing court comprising, a base of substantially rigid materIal sloped relative to the horizontal, resilient cushion means of cellular plastic over the entire base, said cushion means having formed in its entire upper surface drainage channels extending generally parallel to the base to drain water from the court to at least one edge thereof, and an abrasive resistant flexible permeable element over said cushion means.
Claim 5
Dependent Claim
66 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, said base having formed in substantially its entire upper surface drainage channels extending generally parallel to the base to drain water from the court to at least one edge thereof, a resilient cushion of permeable cellular material over the entire base, and an abrasive resistant flexible permeable element over the cushion.
Claim 6
Dependent Claim
66 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, said base having formed in substantially its entire upper surface drainage channels extending generally parallel to the base to drain water from the court to at least one edge thereof, a resilient cushion of permeable cellular material over the entire base, and an abrasive resistant flexible permeable element over the cushion.
Claim 7
Dependent Claim
65 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, resilient cushion means of permeable material over said base, said cushion means having formed in its entire lower surface drainage channels extending generally parallel to the base to drain water from the court to at least one edge thereof, and an abrasive resistant flexible permeable member over said cushion means.
Claim 8
Dependent Claim
65 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, resilient cushion means of permeable material over said base, said cushion means having formed in its entire lower surface drainage channels extending generally parallel to the base to drain water from the court to at least one edge thereof, and an abrasive resistant flexible permeable member over said cushion means.
Claim 9
Dependent Claim
87 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, drainage means over said base having formed in at least one of its upper and lower surfaces drainage channels open to receive water from above said drainage means and extending generally parallel to the base to drain water from the court to at least one edge thereof, and an abrasive resistant flexible permeable layer overlying said means, at least one of said drainage means and said permeable layer providing a resilient cushion.
Claim 10
Dependent Claim
87 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, drainage means over said base having formed in at least one of its upper and lower surfaces drainage channels open to receive water from above said drainage means and extending generally parallel to the base to drain water from the court to at least one edge thereof, and an abrasive resistant flexible permeable layer overlying said means, at least one of said drainage means and said permeable layer providing a resilient cushion.
Claim 11
Dependent Claim
71 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, rigid impermeable means over the entire base having formed in its entire upper surface drainage channels extending generally parallel to the base to drain water from the court to at least one edge thereof, cushion means of permeable resilient cellular material over the rigid means, and an abrasive resistant flexible permeable means over said cushion means.
Claim 12
Dependent Claim
71 words
A playing court comprising, a base of substantially rigid material sloped relative to the horizontal, rigid impermeable means over the entire base having formed in its entire upper surface drainage channels extending generally parallel to the base to drain water from the court to at least one edge thereof, cushion means of permeable resilient cellular material over the rigid means, and an abrasive resistant flexible permeable means over said cushion means.
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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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |