US4751131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waferboard lumber
Assignee: TRUS JOIS MACMILLAN A LP
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Filing: 1986-09-03
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Granted: 1988-06-14
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Expires: 2006-09-03
Abstract
Abstract Substitute lumber pieces having strengths and densities substantially equivalent to lumber are cut from single layer panels of over about 1 and normally less than 4 inches thickness made from wood wafers. The wafers are oriented with their lengths having a mean deviation to the longitudinal length of the panel measured in the major plane of the panel in the range of 0 to 10 degrees and a mean deviation measured in a minimum longitudinal plane perpendicular to the major plane from 0 to about 5 degrees and have an average effective length of at least 8 inches (200 mm), and preferably an average thickness less than 0.15 inches (4 mm) and a width of at least 0.25 inches (6 mm). Lumber is made by cutting the panel longitudinally. Preferably the panels are formed to have a substantially uniform density profile throughout their thicknesses.
Inventors
- 👤 Derek Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:45
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/04; B32; B32B; B32B21/00; B32B21/13; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24992; Y10T428/25; Y10T428/253; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/3196; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
A waferboard lumber product comprising discrete lengths of lumber each having a thickness of at least 1 inch (25 mm) and being cut from a single layer panel made from wood wafers, said wafers having been oriented with their lengths having a mean deviation to the longitudinal axis of the panel measured in the major plane of said single layer panel in the range of 0 to 10 degrees and a mean deviation measured in a minor plane extending longitudinally of said panel and perpendicular to said major plane of from 0 to 5 degrees, said wafers having an average length measured in the grain direction of the wafer of at least 8 inches (200 mm), said discrete lengths of lumber each having a pair of cut edges spaced to defined the width of said lumber products said the cut edges extending substantially parallel to said longitudinal axis of said panel from which said lumber is cut.
Claim 2
Dependent Claim
157 words
A waferboard lumber product comprising discrete lengths of lumber each having a thickness of at least 1 inch (25 mm) and being cut from a single layer panel made from wood wafers, said wafers having been oriented with their lengths having a mean deviation to the longitudinal axis of the panel measured in the major plane of said single layer panel in the range of 0 to 10 degrees and a mean deviation measured in a minor plane extending longitudinally of said panel and perpendicular to said major plane of from 0 to 5 degrees, said wafers having an average length measured in the grain direction of the wafer of at least 8 inches (200 mm), said discrete lengths of lumber each having a pair of cut edges spaced to defined the width of said lumber products said the cut edges extending substantially parallel to said longitudinal axis of said panel from which said lumber is cut.
Claim 3
Dependent Claim
23 words
A lumber product as defined in claim 1 wherein said lumber product has a density within the range of 25-50 lb/ft 3 .
Claim 4
Dependent Claim
33 words
A lumber product as defined in claim 2 wherein said wafers have an average thickness of less than 0.15 inches (4 mm) and an average width of at least 0.25 inches (6 mm).
Claim 5
Dependent Claim
26 words
A lumber product as defined in claim 2 wherein said mean deviation measured in said minor plane is in the range of 0 to 3 degrees.
Claim 6
Dependent Claim
17 words
A lumber product as defined in claim 2 wherein said average width is at least 0.5 inches.
Claim 7
Dependent Claim
23 words
A lumber product as defined in claim 2 wherein said wafers have a mean length of between 10 and 24 inches (250-600 mm).
Claim 8
Dependent Claim
16 words
A lumber product as defined in claim 2 having a substantially uniform density to thickness profile.
Claim 9
Dependent Claim
25 words
A lumber product as defined in claim 2 wherein said density profile to thickness has a deviation from the mean density of less than 3%.
Claim 10
Dependent Claim
22 words
A lumber product as defined in claim 3 wherein said wafers have an average thickness of less than 0.1 inches (2.5 mm).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |