Wood seasoning and modification
Abstract
Abstract A PROCESS FOR SEASONING AND/OR MODIFYING WOOD WHICH COMPRISES IMPREGNATING WOOD TO BE SEASONED WITH A HALOGENATED HYDROCARBON SOLVENT OR WOOD TO BE SEASONED AND MODIFIED OR ONLY MODIFIED WITH A HALOGENATED HYDROCARBON SOLVENT WHICH CONTAINS A WOOD MODIFYING CHEMICAL E.G., WOOD PRESERVATIVE, FIRE RETARDENT AND/OR COLORANT, AT AMBIENT TEMPERATURE TO ABOUT 250* F. UNDER ATMOSPHERIC OR SUPER-ATMOSPHERIC PRESSURE, REMOVING ACCESS SOLVENT, INCLUDING EXCESS MODIFYING CHEMICAL, FROM THE WOOD, AND SUBJECTING THE SO-IMPREGNATED WOOD TO A HEATING FLUID, E.G., THE VAPORS OF WATER OR A HALOGENATED HYDROCARBON SOLVENT, TO REMOVE THE IMPREGNATED SOLVENT AND, IF SEASONING, WATER AND REMOVING THE SO VAPORIZED SOLVENT AND WATER FROM ASSOCIATION WITH THE WOOD.
Inventors
- 👤 James L Dunn Jr
- 👤 Harold G Liddell
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |