Patent US5548776A successfully refreshed from Google Patents.
US3572224A
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Load supporting plank system
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1968-10-14
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Granted: 1971-03-23
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Expires: 1988-10-14
Abstract
Abstract THIS INVENTION RELATES TO AN IMPROVED LOAD SUPPORTING PLANK SYSTEM COMPRISED OF A SERIES OF REMOVABLY INTERLOCKED PLANKS WHEREIN THE JOINTS FORMED BY THE VARIOUS MARGINAL EDGES OF THE INTERLOCKED PLANKS ARE PROVIDED WITH UNIQUE LOCKING AND SEALING MEANS TO PREVENT THE PENETRATION OF WATER AND THE LIKE THROUGH THE SAID JOINTS AND FACILITATE THE INSTALLATION OF THE SYSTEM.
Inventors
- 👤 Robert E Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:13
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/14; E01C9/00; E01C9/08; E01C9/083
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |