US2942999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laboratory test for determining brazeability of copper-plated steel strip
Assignee: Pittsburgh Steel Co
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Filing: 1958-08-29
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Granted: 1960-06-28
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Expires: 1978-08-29
Abstract
No abstract record available.
Inventors
- 👤 Edward J Roehl
- 👤 Emory B Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:35
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/20; G01N33/208; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
IN A METHOD OF LABORATORY TESTING OF THE BRAZEABILITY OF COPPER-PLATED STEEL STRIP, THE STEPS WHICH COMPRISE TAKING A SPECIMEN OF THE STRIP, CLEANING THE SPECIMEN, REMOVING COPPER PLATING FROM THE SPECIMEN, RINSING THE STRIPPED SPECIMEN IN WATER, DIPPING THE RINSED SPECIMEN IN AN AQUEOUS SOLUTION CONTAINING ABOUT 30 PARTS PER MILLION OF CHLORIDE ION AS SODIUM CHLORIDE, AT A SELECTED BUT RELATIVELY CONSTANT TEMPERATURE, FOR ABOUT THREE MINUTES, THEN WITHOUT RINSING, IMMERSING THE SPECIMEN FOR ABOUT TWO MINUTES IN AN AQUEOUS IMMERSION COPPER PLATING TEST BATH CONTAINING FROM ABOUT 200 TO ABOUT 325 GRAMS PER LITER OF CUSO45H2O, ABOUT 6 TO ABOUT 10 GRAMS PER LITER OF OXALIC ACID, AND FROM ABOUT 10 TO ABOUT 50 PARTS PER MILLION OF CHLORIDE ION AS SODIUM CHLORIDE, AND HAVING A SELECTED BUT RELATIVELY CONSTANT TEMPERATURE, WHEREBY TO PROVIDE AN IMMERSION DEPOSIT OF COPPER THEREON, AND VISUALLY EXAMINING THE IMMERSION COPPER DEPOSIT IN COMPARISON WITH A PRE-ESTABLISHED RATING SCHEDULE TO DETERMINE THE RELATIVE BRAZEABLITY OF THE ORIGINAL COPPER-PLATED STRIP FROM WHICH THE SPECIMEN HAS BEEN TAKEN.
Claim 2
Dependent Claim
174 words
IN A METHOD OF LABORATORY TESTING OF THE BRAZEABILITY OF COPPER-PLATED STEEL STRIP, THE STEPS WHICH COMPRISE TAKING A SPECIMEN OF THE STRIP, CLEANING THE SPECIMEN, REMOVING COPPER PLATING FROM THE SPECIMEN, RINSING THE STRIPPED SPECIMEN IN WATER, DIPPING THE RINSED SPECIMEN IN AN AQUEOUS SOLUTION CONTAINING ABOUT 30 PARTS PER MILLION OF CHLORIDE ION AS SODIUM CHLORIDE, AT A SELECTED BUT RELATIVELY CONSTANT TEMPERATURE, FOR ABOUT THREE MINUTES, THEN WITHOUT RINSING, IMMERSING THE SPECIMEN FOR ABOUT TWO MINUTES IN AN AQUEOUS IMMERSION COPPER PLATING TEST BATH CONTAINING FROM ABOUT 200 TO ABOUT 325 GRAMS PER LITER OF CUSO45H2O, ABOUT 6 TO ABOUT 10 GRAMS PER LITER OF OXALIC ACID, AND FROM ABOUT 10 TO ABOUT 50 PARTS PER MILLION OF CHLORIDE ION AS SODIUM CHLORIDE, AND HAVING A SELECTED BUT RELATIVELY CONSTANT TEMPERATURE, WHEREBY TO PROVIDE AN IMMERSION DEPOSIT OF COPPER THEREON, AND VISUALLY EXAMINING THE IMMERSION COPPER DEPOSIT IN COMPARISON WITH A PRE-ESTABLISHED RATING SCHEDULE TO DETERMINE THE RELATIVE BRAZEABLITY OF THE ORIGINAL COPPER-PLATED STRIP FROM WHICH THE SPECIMEN HAS BEEN TAKEN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |