Patent US3570204A successfully refreshed from Google Patents.
US3570204A
Expired / Lapsed
US
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Truss joists
Assignee: Timber Structures Inc
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Filing: 1969-09-24
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Granted: 1971-03-16
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Expires: 1989-09-24
Abstract
Abstract A TRUSS JOIST 20 INCLUDES COMPRESSION WEBS 33 HEAVIER THAN TENSION WEBS 32 AND DOUBLED IN THE HIGHER LOADED PORTIONS. JOINTS 36 INCLUDE KNURLED PINS KEYED TO THE WEBS AND ROTATABLE IN THE CHORDS. HEEL JOINTS 24 INCLUDE ANGLE MEMBERS EXTENDING BEYOND THE PIN 44 OVER THE BEARING WALL 22 AND ANCHORED BY NAILS 84 TO THE UPPER CHORD AND BY NAILS 86 TO THE BEARING WALL. A HIGH LOAD TRUSS JOIST 100 INCLUDES TWO BOARDS FOR EACH CHORD WITH CUPPED SPRING WASHERS 160 RETAINING THE BOARDS ON PINS 134. HEEL JOINTS 114 INCLUDE VERTICALLY SPACING ANGLE MEMBERS SECURED TO THE BEARING WALL.
Inventors
- 👤 George R Birkemeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:46
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/29; E04C3/292
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |