Patent US3675336A successfully refreshed from Google Patents.
US3675336A
Expired / Lapsed
US
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Method for drying wood
Assignee: Weyerhaeuser Co
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Filing: 1969-07-17
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Granted: 1972-07-11
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Expires: 1989-07-17
Abstract
Abstract An improvement in the drying of wood which allows drying at an equal or faster than conventional rate with less degrade, fewer stresses, and less total shrinkage, comprising treating the wood prior to drying with a material capable of reducing the interfacial tension at the water-air boundaries in the cell structure of the wood. Preferably the wood is treated with an aqueous solution of a non-volatile surface active agent, such as an alkylarylsulfonate.
Inventors
- 👤 Dallas S Dedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:46
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/005; F26B2210/00; F26B2210/16
Claims Analysis
Total Claims: 0
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |