Patent US4376745A successfully refreshed from Google Patents.
US4376745A
Expired / Lapsed
US
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Particle board process using furan resin/isocyanate binder
Assignee: Washington State University Research Foundation
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Filing: 1981-06-15
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Granted: 1983-03-15
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Expires: 2001-06-15
Abstract
Abstract A binder for use in the preparation of particle boards comprising blends of polyisocyanate and furan resins.
Inventors
- 👤 William E. Johns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:38
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/6705; B; B27; B27N; B27N3/00; B27N3/007; C08G18/40; C08G18/54; C08G18/64; C08L; C08L97/00; C08L97/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A process for the preparation of a particle board comprising the steps of blending a polyisocyanate with a furan resin to form a binder, mixing said binder with wood chip particles and molding said mixture of binder and cellulosic material under heat to form said particle board.
Claim 2
Dependent Claim
47 words
A process for the preparation of a particle board comprising the steps of blending a polyisocyanate with a furan resin to form a binder, mixing said binder with wood chip particles and molding said mixture of binder and cellulosic material under heat to form said particle board.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein said binder and said wood chip particles are molded at 350° F. for 41/2 minutes at 500 psi.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein said furan resin is blended with said polyisocyanate to form a solution having a furan resin content of from 5-50 percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |