Patent US3566560A successfully refreshed from Google Patents.
US3566560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-cast concrete panels
Assignee: WATES Ltd
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Filing: 1969-02-14
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Granted: 1971-03-02
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Expires: 1989-02-14
Abstract
Abstract TWO SIMILAR, RECTANGULAR, PRE-CAST, CONCRETE, VERTICAL WALL PANELS DISPOSED ONE ABOVE THE OTHER ARE JOINED TOGETHER BY A JOINT INCLUDING A HORIZONTAL PLATE AND A VERTICAL ATTACHMENT BAR. THE PLATE IS THE BOTTOM WALL OF A SHORT TUBE EXTENDING WIDTHWISE OF THE LOWER HORIZONTAL EDGE OF THE UPPER PANEL AND IS ANCHORED IN THIS PANEL BY MEANS OF TWO OBLIQUE ANCHORING MEMBERS FIXED TO THE PLATE AND EMBEDDED IN THE PANEL. THE BAR IS EMBEDDED IN THE LOWER PANEL AND ITS UPPER END ZONE PROJECTS THROUGH A CENTRAL APERTURE IN THE PLATE. A NUT SCREWED ON THIS ZONE BEARS DOWNWARDLY ON THE PLATE VIA A RADIALLY SLOTTED WASHER.
Inventors
- 👤 Norman Edward Wakefield
- 👤 Stuart John Alexander
- 👤 James Francis Morrish
- 👤 William Beck
- 👤 Raymond Sturgis Groves
- 👤 Michael James Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:58
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/02; E04B1/04; E04B1/043; E04B1/38; E04B1/41; E04B1/4114
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |