US3205589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of drying wood by oil immersion and vacuum treatment to selected moisture content with oil recovery
Assignee: WEST WOOD PROC CORP
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Filing: 1961-09-27
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Granted: 1965-09-14
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Expires: 1981-09-27
Abstract
No abstract record available.
Inventors
- 👤 Richard D Fies
- 👤 William W Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:29
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/005; F26B2210/00; F26B2210/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
THE PROCESS OF DRYING WOOD COMPRISING IMMERSING THE WOOD IN A HOT BATH OF WATER-IMMISCIBLE DRYING OIL HAVING A BOILING POINT SUBSTANTIALLY ABOVE THE BOILING POINT OF WATER UNDER CONTROLLED CONDITIONS OF BATH CIRCULATION, TEMPERATURE AND PRESSURE AND FOR A TIME SUCH THAT THE MOISTURE CONTENE OF THE WOOD IS RAPIDLY REDUCED TO AND SUBSTANTIALLY STABILIZED AT A SELECTED VALUE IN THE RANGE OF ABOUT 2% TO ABOUT 7% BY WEIGHT, SEPARATING THE WOOD FROM THE OIL BATH, AND MAINTAINING THE MOISTURE CONTENT OF THE WOOD WITHIN SAID RANGE WHLE REMOVING AT LEAST MOST OF THE RESIDUAL DRYING OIL FROM THE WOOD BY MAINTAINING THE WOOD UNDER A VACUUM PRESSURE OF NOT MORE THAN ABOUT ONE-HALF ATMOSPHERE AND AT A TEMPERATURE OF AT LEAST ABOUT 240*F. IN A CIRCULATING ATMOSPHERE OF SUPERHEATED STEAMUNTIL THE DRYING OIL CONTENT OF THE WOOD IS LESS THAN ABOUT 0.5% BY WEIGHT.
Claim 2
Dependent Claim
147 words
THE PROCESS OF DRYING WOOD COMPRISING IMMERSING THE WOOD IN A HOT BATH OF WATER-IMMISCIBLE DRYING OIL HAVING A BOILING POINT SUBSTANTIALLY ABOVE THE BOILING POINT OF WATER UNDER CONTROLLED CONDITIONS OF BATH CIRCULATION, TEMPERATURE AND PRESSURE AND FOR A TIME SUCH THAT THE MOISTURE CONTENE OF THE WOOD IS RAPIDLY REDUCED TO AND SUBSTANTIALLY STABILIZED AT A SELECTED VALUE IN THE RANGE OF ABOUT 2% TO ABOUT 7% BY WEIGHT, SEPARATING THE WOOD FROM THE OIL BATH, AND MAINTAINING THE MOISTURE CONTENT OF THE WOOD WITHIN SAID RANGE WHLE REMOVING AT LEAST MOST OF THE RESIDUAL DRYING OIL FROM THE WOOD BY MAINTAINING THE WOOD UNDER A VACUUM PRESSURE OF NOT MORE THAN ABOUT ONE-HALF ATMOSPHERE AND AT A TEMPERATURE OF AT LEAST ABOUT 240*F. IN A CIRCULATING ATMOSPHERE OF SUPERHEATED STEAMUNTIL THE DRYING OIL CONTENT OF THE WOOD IS LESS THAN ABOUT 0.5% BY WEIGHT.
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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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |