US3135632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting ferrous metal surfaces from rerusting
Assignee: Individual
•
Filing: 1957-05-24
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Granted: 1964-06-02
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Expires: 1977-05-24
Abstract
No abstract record available.
Inventors
- 👤 William R Lucas
- 👤 Karl F Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:33
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/063; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN THE METHOD OF PROTECTING METAL SURFACES SELECTED FROM THE GROUP CONSISTING OF FERROUS METAL SURFACES, CARBON-FERROUS METAL SURFACES, AND LOW ALLOY FERROUS METAL SURFACES FROM RERUSTING AFTER REMOVAL FROM ACID PICKING BATHS, THE STEPS WHICH COMPRISE: ADDING TO THE ACID PICKLING BATH A SMALL AAMOUNT OF AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ARCIDINE,1-AMINO ACRIDINE, 1-BROMO ACRIDINE AND MIXTURES THEREOF, WHEREBY THE METAL SURFACES ARE RENDERED SUBSTANTIALLY INACTIVE TO THE NORMAL EFFECT OF ATMOSPHERIC OXIDATION; REMOVING THE INACTIVATED FRESHLY PICKED METAL FROM THE ACID PICKING BATH; AND ALLOWING THE METAL TO DRY.
Claim 2
Dependent Claim
95 words
IN THE METHOD OF PROTECTING METAL SURFACES SELECTED FROM THE GROUP CONSISTING OF FERROUS METAL SURFACES, CARBON-FERROUS METAL SURFACES, AND LOW ALLOY FERROUS METAL SURFACES FROM RERUSTING AFTER REMOVAL FROM ACID PICKING BATHS, THE STEPS WHICH COMPRISE: ADDING TO THE ACID PICKLING BATH A SMALL AAMOUNT OF AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ARCIDINE,1-AMINO ACRIDINE, 1-BROMO ACRIDINE AND MIXTURES THEREOF, WHEREBY THE METAL SURFACES ARE RENDERED SUBSTANTIALLY INACTIVE TO THE NORMAL EFFECT OF ATMOSPHERIC OXIDATION; REMOVING THE INACTIVATED FRESHLY PICKED METAL FROM THE ACID PICKING BATH; AND ALLOWING THE METAL TO DRY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |