US3560251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wood treatment method
Assignee: Hager AB
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Filing: 1966-07-11
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Granted: 1971-02-02
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Expires: 1986-07-11
Abstract
Abstract AFTER WOOD HAS BEEN IMPREGNATED WITH AN AQUEOUS SOLUTION OF A WOOD PRESERVATIVE IT IS DRIED BY HEATING IT IN A HEATED BATH OF HIGH-BOILING OIL IN A CHAMBER, UNDER VACUUM, THE TEMPERATURE AND SUBATMOSPHERIC PRESSURE BEING ADJUSTED TO REMOVE THE SOLVENT AT A TEMPERATURE BELOW THE NORMAL BOILING POINT OF THE SOLVENT.
Inventors
- 👤 Bror Olof Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:14
CPC Classifications
B; B27; B27K; B27K5/00; B27K5/04; B27K3/00; B27K3/02; B27K3/0278; B27K3/0292; B27K3/52; B27K5/001; B27K5/02; F; F26; F26B; F26B7/00; F26B2210/00; F26B2210/16; F26B5/00; F26B5/005; Y; Y10; Y10S; Y10S428/00; Y10S428/907
Claims Analysis
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References 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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |