US3293148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning steel surfaces
Assignee: Henkel Corp
•
Filing: 1964-02-27
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Granted: 1966-12-20
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Expires: 1984-02-27
Abstract
No abstract record available.
Inventors
- 👤 Gaillard W Dell
- 👤 Edwin W Goodspeed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:18
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/044; C11D3/16; C11D3/20; C11D3/2075; C11D3/2086; C11D3/37; C11D3/3703; C11D3/3707; C23; C23G; C23G1/00; C23G1/14; C23G1/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD OF CLEANING STEEL SURFACES WHICH COMPRISES CONTACTING THE SURFACE TO BE CLEANED WITH AN AQUEOUS ALKALINE SOLUTION CONSISTING ESSENTIALLY OF AT LEAST ABOUT 0.3 PERCENT BY WEIGHT OF THE SOLUTION OF AN ALKALI METAL HYDROXIDE, AN OXIDIZING AGENT IN AN AMOUNT SUFFICIENT TO PROVIDE OXIDIZING POWER EQUIVALENT TO THAT OF HEXAVALENT CHROMIUM IONS IN THE AMOUNT OF AT LEAST ABOUT 0.002 PERCENT BY WEIGHT OF THE SOLUTION, AT LEAST ABOUT 0.1 PERCENT BY WEIGHT OF THE SOLUTION OF A GLUCONIC ACID MATERIAL AND AT LEAST ABOUT 0.01 PERCENT BY WEIGHT OF THE SOLUTION OF A POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF ABOUT 200 TO ABOUT 20,000.
Claim 2
Independent Claim
112 words
A METHOD OF CLEANING STEEL SURFACES WHICH COMPRISES CONTACTING THE SURFACE TO BE CLEANED WITH AN AQUEOUS ALKALINE SOLUTION CONSISTING ESSENTIALLY OF AT LEAST ABOUT 0.3 PERCENT BY WEIGHT OF THE SOLUTION OF AN ALKALI METAL HYDROXIDE, AN OXIDIZING AGENT IN AN AMOUNT SUFFICIENT TO PROVIDE OXIDIZING POWER EQUIVALENT TO THAT OF HEXAVALENT CHROMIUM IONS IN THE AMOUNT OF AT LEAST ABOUT 0.002 PERCENT BY WEIGHT OF THE SOLUTION, AT LEAST ABOUT 0.1 PERCENT BY WEIGHT OF THE SOLUTION OF A GLUCONIC ACID MATERIAL AND AT LEAST ABOUT 0.01 PERCENT BY WEIGHT OF THE SOLUTION OF A POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF ABOUT 200 TO ABOUT 20,000.
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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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |