US3078180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing a ferrous surface for one-fire porcelain enameling
Assignee: Eagle Picher Co
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Filing: 1960-06-23
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Granted: 1963-02-19
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Expires: 1980-06-23
Abstract
No abstract record available.
Inventors
- 👤 Jason M Zander
- 👤 Delott Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:28
CPC Classifications
C; C23; C23D; C23D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR CONDITIONING A FERROUS SURFACE FOR THE SUBSEQUENT APPLICATION THEREON OF A ONE-FIRE PORCELAIN ENAMEL FINISH, SAID PROCESS COMPRISING THE STEPS OF SUBJECTING THE SURFACE TO AN INITIAL CLEANING STEP WHICH IS EFFECTIVE TO REMOVE OIL AND DIRT FROM IT, RINSING THE SURFACE, SUBJECTING THE SURFACE TO A SOLUTION CONTAINING BETWEEN ABOUT 3.0 AND 6.0 WEIGHT PERCENT OF FERRIC SULFATE AT A PH BETWEEN ABOUT 1.1 AND 1.4 AND HAVING A FERROUS SULFATE CONCENTRATION WHICH IS LESS THAN ABOUT 1.5 WEIGHT PERCENT, RINSING THE SURFACE, SUBJECTING THE SURFACE TO A STRONG ACID ETCHANT, RINSING THE SURFACE, SUBJECTING THE SURFACE TO A SOLUTION CONTAINING NICKEL SULFATE AND THEREBY CAUSING THE SURFACE TO BE COATED WITH A THIN NICKEL FLASHING, AND RINSING AND DRYING THE SURFACE.
Claim 2
Dependent Claim
126 words
A PROCESS FOR CONDITIONING A FERROUS SURFACE FOR THE SUBSEQUENT APPLICATION THEREON OF A ONE-FIRE PORCELAIN ENAMEL FINISH, SAID PROCESS COMPRISING THE STEPS OF SUBJECTING THE SURFACE TO AN INITIAL CLEANING STEP WHICH IS EFFECTIVE TO REMOVE OIL AND DIRT FROM IT, RINSING THE SURFACE, SUBJECTING THE SURFACE TO A SOLUTION CONTAINING BETWEEN ABOUT 3.0 AND 6.0 WEIGHT PERCENT OF FERRIC SULFATE AT A PH BETWEEN ABOUT 1.1 AND 1.4 AND HAVING A FERROUS SULFATE CONCENTRATION WHICH IS LESS THAN ABOUT 1.5 WEIGHT PERCENT, RINSING THE SURFACE, SUBJECTING THE SURFACE TO A STRONG ACID ETCHANT, RINSING THE SURFACE, SUBJECTING THE SURFACE TO A SOLUTION CONTAINING NICKEL SULFATE AND THEREBY CAUSING THE SURFACE TO BE COATED WITH A THIN NICKEL FLASHING, AND RINSING AND DRYING THE SURFACE.
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |