US2500954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method involving the use of chemicals for increasing the drying rate of wood
Assignee: United States Department of Agriculture
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Filing: 1947-03-04
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Granted: 1950-03-21
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Expires: 1967-03-04
Abstract
No abstract record available.
Inventors
- 👤 Loughborough William Karl
- 👤 Espenas Leif Dedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:36
CPC Classifications
B; B27; B27K; B27K5/00; B27K5/04; B27K3/00; B27K3/02; B27K3/0278; B27K3/34; B27K3/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS OF DRYING WOOD WHICH COMPRISES IMPREGNATING WITH AND DIFFUSING INTO THE SUBSURFACE OF WOOD A MATERIAL THAT GENERATES A GAS WITHIN THE CELLULAR STRUCTURE OF THE WOOD AT THE TEMPERATURE OF THE SUBSEQUENT DRYING OPERATION, THE WOOD BEING MAINTAINED IN CONTACT WITH THE MATERIAL FOR A PERIOD SUFFICIENT TO CAUSE PENETRATION INTO THE SUB-SURFACE OF THE WOOD, THE MATERIAL IMPREGNATED INTO THE WOOD BEING SODIUM BICARBONATE AND UREA, AND THEN SUBJECTING THE WOOD TO KILN-DRYING.
Claim 2
Dependent Claim
77 words
A PROCESS OF DRYING WOOD WHICH COMPRISES IMPREGNATING WITH AND DIFFUSING INTO THE SUBSURFACE OF WOOD A MATERIAL THAT GENERATES A GAS WITHIN THE CELLULAR STRUCTURE OF THE WOOD AT THE TEMPERATURE OF THE SUBSEQUENT DRYING OPERATION, THE WOOD BEING MAINTAINED IN CONTACT WITH THE MATERIAL FOR A PERIOD SUFFICIENT TO CAUSE PENETRATION INTO THE SUB-SURFACE OF THE WOOD, THE MATERIAL IMPREGNATED INTO THE WOOD BEING SODIUM BICARBONATE AND UREA, AND THEN SUBJECTING THE WOOD TO KILN-DRYING.
References Cited (Backward Citations)
US746678A
Cited
US2347635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |