US2583581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal coating
Assignee: Individual
•
Filing: 1947-07-01
•
Granted: 1952-01-29
•
Expires: 1967-07-01
Abstract
No abstract record available.
Inventors
- 👤 Hiram S Lukens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:14
CPC Classifications
C; C25; C25D; C25D11/00; C25D5/00; C25D5/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A PROCESS OF FORMING A THIN NON-POROUS COAT ON A METALLIC BASE, COMPRISING DEPOSITING A POROUS SILVER COAT OF A THINNESS OF LESS THAN ABOUT .0015 INCH ON SAID BASE, IMMERSING SAID COATED BASE AS AN ANODE IN AN ELECTROLYTIC SOLUTION CAPABLE OF ELECTROCHEMICALLY FORMING WITH SAID SILVER A WATER-INSOLUBLE FUSIBLE SILVER SALT HAVING A LOWER MELTING POINT THAN SAID METALLIC BASE AND SILVER, PASSING AN ELECTRIC CURRENT THROUGH SAID ANODE AND THROUGH SAID ELECTROLYTIC SOLUTION UNTIL SAID POROUS SILVER COAT HAS BEEN PARTLY CONVERTED INTO A WATER-INSOLUBLE SILVER SALT, AND HEATING THE SURFACE OF SAID COATED BASE TO AT LEAST THE MELTING POINT OF SAID SILVER SALT BUT BELOW THE MELTING POINT OF SAID METALLIC BASE AND OF SILVER, WHEREBY SAID SILVER SALT IS MELTED AND FLOW INTO THE PORES OF SAID THIN POROUS SILVER COAT AND CONJOINTLY THEREWITH FORMS A THIN NON-POROUS COAT ON SAID BASE.
Claim 2
Dependent Claim
148 words
A PROCESS OF FORMING A THIN NON-POROUS COAT ON A METALLIC BASE, COMPRISING DEPOSITING A POROUS SILVER COAT OF A THINNESS OF LESS THAN ABOUT .0015 INCH ON SAID BASE, IMMERSING SAID COATED BASE AS AN ANODE IN AN ELECTROLYTIC SOLUTION CAPABLE OF ELECTROCHEMICALLY FORMING WITH SAID SILVER A WATER-INSOLUBLE FUSIBLE SILVER SALT HAVING A LOWER MELTING POINT THAN SAID METALLIC BASE AND SILVER, PASSING AN ELECTRIC CURRENT THROUGH SAID ANODE AND THROUGH SAID ELECTROLYTIC SOLUTION UNTIL SAID POROUS SILVER COAT HAS BEEN PARTLY CONVERTED INTO A WATER-INSOLUBLE SILVER SALT, AND HEATING THE SURFACE OF SAID COATED BASE TO AT LEAST THE MELTING POINT OF SAID SILVER SALT BUT BELOW THE MELTING POINT OF SAID METALLIC BASE AND OF SILVER, WHEREBY SAID SILVER SALT IS MELTED AND FLOW INTO THE PORES OF SAID THIN POROUS SILVER COAT AND CONJOINTLY THEREWITH FORMS A THIN NON-POROUS COAT ON SAID BASE.
References Cited (Backward Citations)
US26978A
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US517275A
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US1758293A
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US1872614A
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US2097300A
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US2060530A
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US2307801A
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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) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |