US2825681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating
Assignee: National Steel Corp
•
Filing: 1953-02-10
•
Granted: 1958-03-04
•
Expires: 1973-02-10
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:33
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/06; C25D7/0614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
THE METHOD OF ELIMINATING STRIATION AND ANODE PATTERN IN THE PROGRESSIVE ELECTROTINPLATING OF A SURFACE OF FERROUS METAL STRIP AT STRIP SPEEDS OF ABOUT 1000 FEET PER MINUTE AND HIGHER, COMPRISING THE STEPS OF PROGRESSIVELY PASSING THE STRIP AT A SPEED OF AT LEAST ABOUT 1000 FEET PER MINUTE THROUGH A WASHING ZONE, A RINSING ZONE AND AN ELECTROTINPLATING ZONE, WASHING THE SURFACE OF THE STRIP TO BE PLATED WITH RELATIVELY COLD WATER IN THE WASHING ZONE, PASSING A STREAM OF HOT AQUEOUS RINSING SOLUTION INTO THE RINSING ZONE, HEATING THE STRIP IN THE RINSING ZONE IN THE ABSENCE OF ELECTROLYTIC TREAT MENT OF THE STRIP TO A TEMPERATURE WITHIN THE RANGE 120* FAHRENHEIT TO 160* FAHRENHEIT BY CONTINUOUSLY BRINGING THE HOT AQUEOUS RINSING SOLUTION INTO INTIMATE CONTACT WITH THE SURFACE TO BE PLATED, AND ELECTROTINPLATING THE SURFACE OF THE HEATED STRIP IN THE ELECTROPLATING ZONE WHILE THE SURFACE TO BE PLATED IS IN CONTACT WITH A BATH OF AQUEOUS ELECTROTINPLATING SOLUTION, THE ELECTROTINPLATING SOLUTION CONTAINING AT LEAST ONE TIN ELECTROLYTE AND THE RINSING SOLUTION CONTAINING SAID ONE TIN ELECTROLYTE.
Claim 2
Independent Claim
180 words
THE METHOD OF ELIMINATING STRIATION AND ANODE PATTERN IN THE PROGRESSIVE ELECTROTINPLATING OF A SURFACE OF FERROUS METAL STRIP AT STRIP SPEEDS OF ABOUT 1000 FEET PER MINUTE AND HIGHER, COMPRISING THE STEPS OF PROGRESSIVELY PASSING THE STRIP AT A SPEED OF AT LEAST ABOUT 1000 FEET PER MINUTE THROUGH A WASHING ZONE, A RINSING ZONE AND AN ELECTROTINPLATING ZONE, WASHING THE SURFACE OF THE STRIP TO BE PLATED WITH RELATIVELY COLD WATER IN THE WASHING ZONE, PASSING A STREAM OF HOT AQUEOUS RINSING SOLUTION INTO THE RINSING ZONE, HEATING THE STRIP IN THE RINSING ZONE IN THE ABSENCE OF ELECTROLYTIC TREAT MENT OF THE STRIP TO A TEMPERATURE WITHIN THE RANGE 120* FAHRENHEIT TO 160* FAHRENHEIT BY CONTINUOUSLY BRINGING THE HOT AQUEOUS RINSING SOLUTION INTO INTIMATE CONTACT WITH THE SURFACE TO BE PLATED, AND ELECTROTINPLATING THE SURFACE OF THE HEATED STRIP IN THE ELECTROPLATING ZONE WHILE THE SURFACE TO BE PLATED IS IN CONTACT WITH A BATH OF AQUEOUS ELECTROTINPLATING SOLUTION, THE ELECTROTINPLATING SOLUTION CONTAINING AT LEAST ONE TIN ELECTROLYTE AND THE RINSING SOLUTION CONTAINING SAID ONE TIN ELECTROLYTE.
References Cited (Backward Citations)
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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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |