US3592580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing the color of wood
Assignee: NEIL DURO CO O
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Filing: 1967-10-06
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Granted: 1971-07-13
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Expires: 1987-10-06
Abstract
Abstract A LOW CONCENTRATE AQUEOUS SOLUTION OF AN OXIDIZING AGENT SELECTED FROM THE GROUP COMPRISING POTASSIUM PERMANGANATE, THE WATER SOLUBLE CHROMATES AND DICHROMATES AND CHROMIC ACID IS APPLIED IN A QUANTITY SMALL ENOUGH SO THAT DRYING TAKES PLACE RAPIDLY. AMMONIUM DICHROMATE GIVES PREFERRED RESULTS. CONCENTRATION OF OXIDIZING AGENT IS SUCH THAT AVAILABLE OXYGEN LIES IN THE RANGE FROM ABOUT 0.025% TO ABOUT 0.30% OF THE TOTAL AQUEOUS SOLUTION AND VARIES WITH WOOD SPECIES IN ACCORDANCE WITH DARKNESS OF NATURAL COLOR.
Inventors
- 👤 Gilbert F Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:20
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/16; B27K5/00; B27K5/02; B27K3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |