US4405542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of a composite material
Assignee: Individual
•
Filing: 1982-01-25
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Granted: 1983-09-20
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Expires: 2002-01-25
Abstract
Abstract A method for the production of a composite material formed from comminuted particles including blending the particles and a suitable adhesive, forming the blend into a mat, and compressing the mass by at most about 65 percent. In related aspects, the particles have a defined diversity of thicknesses, adhesive is used in an amount less than about six percent by weight, and the material is compressed to have a void volume of at least about 10 percent.
Inventors
- 👤 Marian B. Greer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:39
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/02; B; B27; B27N; B27N3/00; B27N3/08; B27N3/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
96 words
A method for the production of a composite rigid article formed from irregularly shaped particles of comminuted wood and wood-like materials, encompassing a wide range of material sizes, thicknesses and types, comprising: a. blending an amount of said wood particles and a sufficient amount of suitable, curable adhesive to form a uniform mixture, b. forming said mixture into a loosely assembled mat, c. compressing said mat to a volume not less than about 35% of the original volume of said mat, and d. curing said adhesive to bond the wood particles into said composite rigid article.
Claim 2
Independent Claim
96 words
A method for the production of a composite rigid article formed from irregularly shaped particles of comminuted wood and wood-like materials, encompassing a wide range of material sizes, thicknesses and types, comprising: a. blending an amount of said wood particles and a sufficient amount of suitable, curable adhesive to form a uniform mixture, b. forming said mixture into a loosely assembled mat, c. compressing said mat to a volume not less than about 35% of the original volume of said mat, and d. curing said adhesive to bond the wood particles into said composite rigid article.
Claim 3
Dependent Claim
29 words
The method of claim 1 in which step c. comprises compressing the mat to a volume not less than about fifty percent of the original volume of the mat.
Claim 4
Dependent Claim
25 words
The method of claim 1 in which step c. comprises compressing the mat to a density of at highest about 35 pounds per cubic foot.
Claim 5
Dependent Claim
24 words
The method of claim 1 in which step c. comprises compressing the mat to have a void volume of at least about ten percent.
Claim 6
Dependent Claim
27 words
The method of claim 1 in which the adhesive of step a. is selected from the group consisting of propylmethyldiisocyanate, urea formaldehyde and phenolic formaldehyde based adhesives.
Claim 7
Dependent Claim
25 words
The method of claim 1 in which step a. comprises blending the comminuted wood particles with at most about six weight percent of the adhesive.
Claim 8
Dependent Claim
44 words
The method of claim 1 and which further includes, prior to step a., the steps of sizing the comminuted particles to have at least about 25 weight percent of particles having a thickness of at least about 2.5 mm and drying the comminuted particles.
Claim 9
Dependent Claim
24 words
The method of claim 7 in which step c. comprises compressing the mat to have a void volume of at least about ten percent.
Claim 10
Dependent Claim
29 words
The method of claim 7 in which said drying is to dry the particles to a moisture content by weight of from about one percent to about six percent.
Claim 11
Dependent Claim
30 words
The method of claim 7 in which said sizing is also to provide at least about 25 weight percent of particles having a thickness of at most about 1.0 mm.
Claim 12
Dependent Claim
29 words
The method of claim 10 in which step c. comprises compressing the mat to a volume not less than about fifty percent of the original volume of the mat.
Claim 13
Dependent Claim
25 words
The method of claim 11 in which step a. comprises blending the comminuted wood particles with at most about three weight percent of the adhesive.
Claim 14
Independent Claim
113 words
A method for the production of a composite rigid article formed from irregularly shaped particles of comminuted wood and wood-like materials, encompassing a wide range of material sizes, thicknesses and types, comprising: a. blending an amount of said wood particles and a sufficient amount of suitable, curable adhesive to form a uniform mixture, wherein at least 25% of the wood particles have a thickness of at least about 2.5 mm, b. forming said mixture into a loosely assembled mat, c. compressing said mat to a volume not less than about 35% of the original volume of said mat, and d. curing said adhesive to bond the wood particles into said composite rigid article.
Claim 15
Independent Claim
113 words
A method for the production of a composite rigid article formed from irregularly shaped particles of comminuted wood and wood-like materials, encompassing a wide range of material sizes, thicknesses and types, comprising: a. blending an amount of said wood particles and a sufficient amount of suitable, curable adhesive to form a uniform mixture, wherein at least 25% of the wood particles have a thickness of at least about 2.5 mm, b. forming said mixture into a loosely assembled mat, c. compressing said mat to a volume not less than about 35% of the original volume of said mat, and d. curing said adhesive to bond the wood particles into said composite rigid article.
Claim 16
Dependent Claim
24 words
The method of claim 13 in which step c. comprises compressing the mat to have a void volume of at least about ten percent.
Claim 17
Dependent Claim
25 words
The method of claim 13 in which step c. comprises compressing the mat to a density of at highest about 35 pounds per cubic foot.
Claim 18
Dependent Claim
29 words
The method of claim 13 in which step c. comprises compressing the mat to a volume not less than about fifty percent of the original volume of the mat.
Claim 19
Dependent Claim
30 words
The method of claim 13 in which the comminuted wood particles further include at least about 25 weight percent of particles having a thickness of at most about 1.0 mm.
Claim 20
Dependent Claim
24 words
The method of claim 17 in which step c. comprises compressing the mat to have a void volume of at least about ten percent.
Claim 21
Dependent Claim
25 words
The method of claim 18 in which step c. comprises compressing the mat to a density of at highest about 35 pounds per cubic foot.
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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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |