Patent US2805061A successfully refreshed from Google Patents.
Patent US3564803A successfully refreshed from Google Patents.
US3564803A
Expired / Lapsed
US
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Extensible scaffold and other load supporting elements
Assignee: RMD Kwikform Ltd
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Filing: 1968-12-06
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Granted: 1971-02-23
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Expires: 1988-12-06
Abstract
Abstract THIS INVENTION RELATES TO SCAFFOLD AND OTHER LOAD SUPPORTING ELEMENTS, WHICH ARE OF TELESCOPIC CONSTRUCTION, WHEREIN THE OUTER MEMBER IS FORMED AS A CHANNEL, AS OPPOSED TO A CLOSE-SIDED TUBE.
Inventors
- 👤 Alan J Breeze
- 👤 Patrick A D Evans
- 👤 Colin Wheelock
- 👤 William D Orwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:10
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/36; E04G11/48
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |