US4212928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wood-polymer composites
Assignee: Union Carbide Corp
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Filing: 1978-12-12
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Granted: 1980-07-15
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Expires: 1998-12-12
Abstract
Abstract Composites of wood cellulose and certain polymeric compositions are formed at the surface of wooden articles and have the property of ready sandability to a smooth, low porosity state, thus making the surface ideal for a variety of wood finishing operations.
Inventors
- 👤 William C. Arney, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:35
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/10; C09D133/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/4935; Y10T428/662
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
51 words
A composite comprising wood cellulose and as a sealer a polymer of: (a) 50 to 60 weight percent of methyl methacrylate, and (b) 35 to 45 weight percent of ethyl acrylate, and (c) 1 to 8 weight percent of methacrylic acid, and (d) 0.2 to 1 weight percent of pentaerythritol triacrylate.
Claim 2
Dependent Claim
51 words
A composite comprising wood cellulose and as a sealer a polymer of: (a) 50 to 60 weight percent of methyl methacrylate, and (b) 35 to 45 weight percent of ethyl acrylate, and (c) 1 to 8 weight percent of methacrylic acid, and (d) 0.2 to 1 weight percent of pentaerythritol triacrylate.
Claim 3
Dependent Claim
38 words
A process for the formation of the composite of claim 1 wherein a coating of an aqueous dispersion of a polymeric composition of claim 1 is applied to a natural wood surface which is then allowed to dry.
References Cited (Backward Citations)
US3935364A
Cited
US3879357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |