US2947648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinification of wood
Assignee: Dow Chemical Co
•
Filing: 1955-12-21
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Granted: 1960-08-02
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Expires: 1975-12-21
Abstract
No abstract record available.
Inventors
- 👤 Lawrence F Sonnabend
- 👤 Charles R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:34
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/02; B27K3/0278; B27K3/0285; B27K3/15; B27K3/156; C; C08; C08L; C08L97/00; C08L97/02; C08K; C08K3/00; C08K3/30; C08L61/00; C08L61/04; C08L61/06; C08L61/20; C08L61/22; C08L61/24; C08L71/00; C08L71/08; C08L71/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD OF RESINIFYING WOOD WHICH COMPRISES CONTACTING THE WOOD SULFUR DIOXIDE TO CAUSE PERMEATION OF THE LATTER INTO THE WOOD, IMPREGNATING THE WOOD, HAVING SULFUR DIOXIDE ABSORBED THEREIN, WITH A NON-RESINOUS LIQUID CAPABLE OF UNDERGOING A CONDENSATION REACTION IN THE PRESENCE OF CONDENSING AGENTS TO FORM A WATER-ELIMINATING SOLID RESIN, AND MAINTAINING THE IMPREGNATED WOOD AT A REACTION TEMPERATURE UNTIL A RESIN IS FORMED THEREIN.
Claim 2
Independent Claim
66 words
A METHOD OF RESINIFYING WOOD WHICH COMPRISES CONTACTING THE WOOD SULFUR DIOXIDE TO CAUSE PERMEATION OF THE LATTER INTO THE WOOD, IMPREGNATING THE WOOD, HAVING SULFUR DIOXIDE ABSORBED THEREIN, WITH A NON-RESINOUS LIQUID CAPABLE OF UNDERGOING A CONDENSATION REACTION IN THE PRESENCE OF CONDENSING AGENTS TO FORM A WATER-ELIMINATING SOLID RESIN, AND MAINTAINING THE IMPREGNATED WOOD AT A REACTION TEMPERATURE UNTIL A RESIN IS FORMED THEREIN.
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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |