US3790401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of composite wood-polymer product
Assignee: Maine C & Sons Inc
•
Filing: 1971-01-27
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Granted: 1974-02-05
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Expires: 1991-01-27
Abstract
Abstract A method of manufacturing a composite wood-polymer product comprising wood permeated throughout with a polymer of tertbutylstyrene, and the resultant product is described. The composite product is characterized by polymer in the cells or pores of wood between adjacent fibers and in the cell walls of the fibers. The product is tough, durable, extremely moisture resistant, and has the appearance of the original wood.
Inventors
- 👤 J Maine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:02
CPC Classifications
B; B27; B27D; B27D1/00; B27K; B27K3/00; B27K3/02; B27K3/15; C; C08; C08L; C08L97/00; C08L97/02; B27K2240/00; B27K2240/70; B27K3/08; C08L25/00; C08L25/02; C08L25/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
17 words
The method of claim 1 wherein said wood is immersed in said monomer-carrier mixture during said impregnation.
Claim 2
Dependent Claim
26 words
The method of claim 2 wherein said wood article is subjected to vacuum treatment to remove air contained in said wood prior to said immersion step.
Claim 3
Dependent Claim
29 words
The method of claim 2 wherein the wood article after removing said excess carrier and monomer is immersed in tert-butylstyrene monomer before polymerizing said monomer cOntained in said wood.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the carrier is methylene chloride.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the carrier is a mixture of alcohol and methylethyl ketone.
Claim 6
Dependent Claim
16 words
The method of claim 3 wherein the carrier is a mixture of methylene chloride and alcohol.
Claim 7
Dependent Claim
12 words
The method of claim 4 wherein the wood article is veneer sheet.
References Cited (Backward Citations)
CA857353A
Cited
US2591768A
Cited
US3077419A
Cited
US3077417A
Cited
US3076738A
Cited
US3401213A
Cited
US3607355A
Cited
US3560255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |