Patent US3771891A successfully refreshed from Google Patents.
US3771891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable rink assembly
Assignee: Vinyl Plastics Inc
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Filing: 1971-09-15
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Granted: 1973-11-13
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Expires: 1991-09-15
Abstract
Abstract An artificial ice skating rink is formed of square panels of plastic sheet material joined together by cooperating tongues and grooves formed on the edges of the panels. The panels are clamped together by pairs of opposing channel members retained around the periphery of the rink and drawn together by steel straps running along the underside of the rink.
Inventors
- 👤 B Nirenski
- 👤 R Grover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:31
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/10; E01C13/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A synthetic ice skating rink formed by combining flat panels having an upper skating surface with tongue-and-groove connections between panels and by clamping the panels together by means of opposing channel members disposed around and receiving the peripheral edge of the rink and attached to one another by means of flat straps disposed along the underside of the panels; said channel members having a web which abuts the peripheral edge of the panels and a pair of spaced flanges which bear against the top and bottom surface of the panels; each end of each strap passing through a slot in the channel member web adjacent the bottom flange thereof; and a fastener connected to each strap end to abut against the channel member web, said fasteners being adjustable to clamp panels between opposing channel members by pulling the strap connecting said opposing channel members through said slots.
Claim 2
Dependent Claim
147 words
A synthetic ice skating rink formed by combining flat panels having an upper skating surface with tongue-and-groove connections between panels and by clamping the panels together by means of opposing channel members disposed around and receiving the peripheral edge of the rink and attached to one another by means of flat straps disposed along the underside of the panels; said channel members having a web which abuts the peripheral edge of the panels and a pair of spaced flanges which bear against the top and bottom surface of the panels; each end of each strap passing through a slot in the channel member web adjacent the bottom flange thereof; and a fastener connected to each strap end to abut against the channel member web, said fasteners being adjustable to clamp panels between opposing channel members by pulling the strap connecting said opposing channel members through said slots.
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |