US2581310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porcelain enamel article and method of producing same
Assignee: Vibrantz Corp
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Filing: 1951-11-06
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Granted: 1952-01-01
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Expires: 1971-11-06
Abstract
No abstract record available.
Inventors
- 👤 Benjamin J Sweo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:51
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34; C23C18/36; C23D; C23D3/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10S428/939
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
168 words
IN THE METHOD OF PROCELAIN ENAMELLING A CLEANED AND ROUGHENED STEEL WORK PIECE SURFACE HAVING DEEP SHARP EDGED PITS THEREIN, THE STEPS COMPRISING IMMERSING SAID ROUGHENED STEEL WORK PIECE IN AN AQUEOUS SOLUTION OF A NICKEL SALT, SAID SOLUTION CONTAINING A REDUCING AGENT SELECTED FROM THE CLASS CONSISTING OF HYPOPHOSPHOROUS ACID AND SALTS THEREOF IN WHICH THE CATIONIC PORTION IS ABOVE TIN IN THE ELECTROMOTIVE SERIES, WHEREBY WHEN THE STEEL WORK PIECE IS IMMERSED IN SAID SOLUTION THE NICKEL SALT IS REDUCED AND NICKEL DEPOSITED ON THE WORK PIECE WITHOUT ION EXCHANGE BETWEEN THE WORK PIECE AND THE SOLUTION, MAINTAINING THE WORK PIECE IN SAID SOLUTION UNTIL THERE HAS BEEN DEPOSITED ON THE ROUGHENED SURFACE THEREOF FROM ABOUT .04 TO ABOUT .25 GRAMS PER SQUARE FOOT OF NICKEL COATING THEREON, WASHING AND DRYING THE WORK PIECE, THEN APPLYING DIRECTLY ON THE THUS NICKEL-COATED ROUGHENED SURFACE OF THE WORK PIECE A COVER COAT PORCELAIN ENAMEL WHICH IS SUBSTANTIALLY FREE OF ADHERENCE PROMOTING OXIDES, AND THEN FIRING SUCH ENAMEL THEREON.
Claim 2
Dependent Claim
168 words
IN THE METHOD OF PROCELAIN ENAMELLING A CLEANED AND ROUGHENED STEEL WORK PIECE SURFACE HAVING DEEP SHARP EDGED PITS THEREIN, THE STEPS COMPRISING IMMERSING SAID ROUGHENED STEEL WORK PIECE IN AN AQUEOUS SOLUTION OF A NICKEL SALT, SAID SOLUTION CONTAINING A REDUCING AGENT SELECTED FROM THE CLASS CONSISTING OF HYPOPHOSPHOROUS ACID AND SALTS THEREOF IN WHICH THE CATIONIC PORTION IS ABOVE TIN IN THE ELECTROMOTIVE SERIES, WHEREBY WHEN THE STEEL WORK PIECE IS IMMERSED IN SAID SOLUTION THE NICKEL SALT IS REDUCED AND NICKEL DEPOSITED ON THE WORK PIECE WITHOUT ION EXCHANGE BETWEEN THE WORK PIECE AND THE SOLUTION, MAINTAINING THE WORK PIECE IN SAID SOLUTION UNTIL THERE HAS BEEN DEPOSITED ON THE ROUGHENED SURFACE THEREOF FROM ABOUT .04 TO ABOUT .25 GRAMS PER SQUARE FOOT OF NICKEL COATING THEREON, WASHING AND DRYING THE WORK PIECE, THEN APPLYING DIRECTLY ON THE THUS NICKEL-COATED ROUGHENED SURFACE OF THE WORK PIECE A COVER COAT PORCELAIN ENAMEL WHICH IS SUBSTANTIALLY FREE OF ADHERENCE PROMOTING OXIDES, AND THEN FIRING SUCH ENAMEL THEREON.
Claim 3
Dependent Claim
18 words
AS A NEW ARTICLE OF MANUFACTURE, A PORCELAIN ENAMELLED STEEL ARTICLE PRODUCED BY THE PROCESS OF CLAIM 1.
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) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |