US3690949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline bath for nonetching removal of scale from titanium workpieces
Assignee: Turco Products Inc
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Filing: 1970-10-26
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Granted: 1972-09-12
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Expires: 1990-10-26
Abstract
Abstract TITANIUM SCALE, GENERALLY COMPRISING OXIDES AND NITRIDES OF TITANIUM, MAY BE REMOVED FROM TITANIUM WORKPIECES WITHOUT SIMULTANEOUSLY RAPIDLY ETCHING THE WORKPIECE BY SUBJECTING THE WORKPIECE TO A SOLUTION IN WATER OF FROM 2 TO 10 POUNDS PER GALLON OF THE MIXTURE CONSISTING ESSENTIALLY OF SODIUM OR POTASSIUM NITRITE, 2-25 WEIGHT PERCENT, SODIUM OR POTASSIUM GLUCONATE 2-25 WEIGHT PERCENT, SODIUM OR POTASSIUM NITRATE, 2-25 WEIGH PERCENT, AND SODIUM HYDROXIDE, BALANCE TO 100 WEIGHT PERCENT, E.G., BY IMMERSING THE WORKPIECE IN AN ELEVATED TEMPERATURE BATH AT TEMPERATURES BETWEEN ABOUT 200*F. AND 300*F.
Inventors
- 👤 Daniel Y Ng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:32
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/06; C11D7/10; C11D7/105; C11D7/22; C11D7/26; C11D7/265; C11D7/32; C11D7/3218; C23; C23G; C23G1/00; C23G1/14; C23G1/20; C23G1/205; C11D2111/00; C11D2111/10; C11D2111/14; C11D2111/20
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |