US3330769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal cleaning
Assignee: 3M Co
•
Filing: 1964-01-23
•
Granted: 1967-07-11
•
Expires: 1984-01-23
Abstract
No abstract record available.
Inventors
- 👤 Golben Michael
- 👤 John W Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:48
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C11; C11D; C11D2111/00; C11D2111/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A BALANCED COMPOSITION FOR PREPARING A WIDE VARIETY OF SCALY, OILY, DIRTY, OR OTHERWISE CONTAMINATED FERROUS METAL SURFACES FOR SUBSEQUENT OVERCOATNG, CONSISTING ESSENTIALLY OF WATER-SOLUBLE MIXTURE OF: SUFFICIENT STRONG ACID, HAVING A DISSOCIATION CONSTANT GREATER THAN 10**-6, TO PROVIDE 1-5 PARTS BY WEIGHT OF HYDROGEN ION, AND AN ACID-STABLE SURFACTANT SYSTEM CONSISTING ESSENTIALLY OF SUBSTANTIALLY EQUAL PARTS BY WEIGHTS OF THE FOLLOWING INDIVIDUALLY ACID-STABLE COMPONENTS: DISPERSANT HAVING AN HLB VALUE OF AT LEAST 17, DETERGENT HAVING AN HLB VALUE IN THE RANGE OF 12-17, SUFFICIENT EMULSIFIER TO EMULSIFY 150 PARTS BY WEIGHT OF MINERAL SPIRITS, SAID EMULSIFIER HAVING A HIGHER MOLECULAR WEIGHT THAN SAID DETERGENT AND AN HLB VALUE IN THE RANGE OF 12-17, AND WETTING AGENT FOR FERROUS METALS, THE LIPOPHILIC GROUPS BEING DOMINANT IN SAID WETTING AGENT, HAVING AN HLB VALUE ON THE ORDER OF 5 OR LESS.
Claim 2
Dependent Claim
140 words
A BALANCED COMPOSITION FOR PREPARING A WIDE VARIETY OF SCALY, OILY, DIRTY, OR OTHERWISE CONTAMINATED FERROUS METAL SURFACES FOR SUBSEQUENT OVERCOATNG, CONSISTING ESSENTIALLY OF WATER-SOLUBLE MIXTURE OF: SUFFICIENT STRONG ACID, HAVING A DISSOCIATION CONSTANT GREATER THAN 10**-6, TO PROVIDE 1-5 PARTS BY WEIGHT OF HYDROGEN ION, AND AN ACID-STABLE SURFACTANT SYSTEM CONSISTING ESSENTIALLY OF SUBSTANTIALLY EQUAL PARTS BY WEIGHTS OF THE FOLLOWING INDIVIDUALLY ACID-STABLE COMPONENTS: DISPERSANT HAVING AN HLB VALUE OF AT LEAST 17, DETERGENT HAVING AN HLB VALUE IN THE RANGE OF 12-17, SUFFICIENT EMULSIFIER TO EMULSIFY 150 PARTS BY WEIGHT OF MINERAL SPIRITS, SAID EMULSIFIER HAVING A HIGHER MOLECULAR WEIGHT THAN SAID DETERGENT AND AN HLB VALUE IN THE RANGE OF 12-17, AND WETTING AGENT FOR FERROUS METALS, THE LIPOPHILIC GROUPS BEING DOMINANT IN SAID WETTING AGENT, HAVING AN HLB VALUE ON THE ORDER OF 5 OR LESS.
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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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |