US2977241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One coat enamel process
Assignee: General Electric Co
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Filing: 1959-03-04
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Granted: 1961-03-28
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Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 Evan M Oliver
- 👤 Harlan P Tripp
- 👤 Lynn E Fussell
- 👤 Frank L Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:27
CPC Classifications
C; C23; C23D; C23D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
THE METHOD OF TREATING A STEEL SURFACE FOR APPLICATION OF A SINGLE FINISH COAT OF ENAMEL WHICH COMPRISES THE STEPS OF CLEANING SAID SURFACE BY MEANS OF AN ALKALI CLEANING SOLUTION, PICKLING THE CLEANED SURFACE BY MEANS OF A HOT SOLUTION CONTAINING FROM 10 TO 30 PERCENT PHOSPHORIC ACID AND HAVING A CONTROLLED FERROUS ION CONTENT OF FROM 0.01 TO 1.0 PERCENT BY WEIGHT AND A FERRIC ION CONTENT OF FROM 0.05 TO 3.0, TO REMOVE FROM THE SURFACE FROM 1.5 TO 3.0 GRAMS OF IRON PER SQUARE FOOT OF EXPOSED SURFACE, WASHING THE PICKLED SURFACE WITH A WEAK ALKALINE SOLUTION TO REMOVE THEREFROM PHOSPHATE COATING FORMED DURING PICKLING OF SAID SURFACE, SUBJECTING SAID WASHED SURFACE TO THE ACTION OF A HOT NICKEL SULPHATE SOLUTION CONTAINING FROM 1 TO 4.0 OUNCES PER GALLON NISO4.7H2O AND 0.001 TO 0.03 PERCENT BY WEIGHT OF PHOSPHATE IONS UNTIL THERE IS OBTAINED ON SAID SURFACE A NICKEL FLASH COATING BETWEEN 0.02 AND 0.35 GRAM PER SQUARE FOOT OF SURFACE, RINSING THE NICKEL COATED SURFACE WITH AN ALKALINE NEUTRALIZING OR INHIBITING SOLUTION AND THEN WITH CLEAR WATER BEFORE DRYING SAID SURFACE IN PREPARATION FOR THE APPLICATION OF A ONE-COAT PROCELAIN ENAMEL.
Claim 2
Independent Claim
196 words
THE METHOD OF TREATING A STEEL SURFACE FOR APPLICATION OF A SINGLE FINISH COAT OF ENAMEL WHICH COMPRISES THE STEPS OF CLEANING SAID SURFACE BY MEANS OF AN ALKALI CLEANING SOLUTION, PICKLING THE CLEANED SURFACE BY MEANS OF A HOT SOLUTION CONTAINING FROM 10 TO 30 PERCENT PHOSPHORIC ACID AND HAVING A CONTROLLED FERROUS ION CONTENT OF FROM 0.01 TO 1.0 PERCENT BY WEIGHT AND A FERRIC ION CONTENT OF FROM 0.05 TO 3.0, TO REMOVE FROM THE SURFACE FROM 1.5 TO 3.0 GRAMS OF IRON PER SQUARE FOOT OF EXPOSED SURFACE, WASHING THE PICKLED SURFACE WITH A WEAK ALKALINE SOLUTION TO REMOVE THEREFROM PHOSPHATE COATING FORMED DURING PICKLING OF SAID SURFACE, SUBJECTING SAID WASHED SURFACE TO THE ACTION OF A HOT NICKEL SULPHATE SOLUTION CONTAINING FROM 1 TO 4.0 OUNCES PER GALLON NISO4.7H2O AND 0.001 TO 0.03 PERCENT BY WEIGHT OF PHOSPHATE IONS UNTIL THERE IS OBTAINED ON SAID SURFACE A NICKEL FLASH COATING BETWEEN 0.02 AND 0.35 GRAM PER SQUARE FOOT OF SURFACE, RINSING THE NICKEL COATED SURFACE WITH AN ALKALINE NEUTRALIZING OR INHIBITING SOLUTION AND THEN WITH CLEAR WATER BEFORE DRYING SAID SURFACE IN PREPARATION FOR THE APPLICATION OF A ONE-COAT PROCELAIN ENAMEL.
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |