US3553921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall construction, particularly for load-bearing walls
Assignee: Individual
•
Filing: 1968-06-26
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Granted: 1971-01-12
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Expires: 1988-06-26
Abstract
Abstract WALL CONSTRUCTION, PARTICULARLY FOR LOAD-BEARING WALLS, CONSISTING OF ELEMENTS WITH AT LEAST THREE INTERJOINED LAYERS, OF WHICH AT LEAST TWO LAYERS ARE LOAD-BEARING AND ONE IS HEAT INSULATING, WHEREIN AT LEAST TWO OUTERMOST LAYERS ARE LOAD-BEARING AND ARE MADE OF WOOD FIBRE BOARDS AND/OR PLYWOOD BOARDS, AND THE INSULATION LAYER OR LAYERS HAS A CALCULABLE COMPRESSION AND TENSILE STRENGTH, AND CAN BE WORKED WITH ORDINARY WOODWORKING TOOLS AND ARE MECHANICALLY STABLE, FOR EXAMPLE EXPANDED PLASTIC, WHEREIN THE PLASTIC INSULATION LAYER IS THROUGH-GOING IN AT LEAST THE LONGITUDINAL DIRECTION OF THE WALL.
Inventors
- 👤 Rasmus Breistein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |