US3171767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for brightening cadmium and zinc
Assignee: Conversion Chemical Corp
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Filing: 1963-09-30
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Granted: 1965-03-02
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth P Bellinger
- 👤 Eugene G Chapdelaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:45
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/04; C23F3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
THE METHOD OF BRIGHTENING METALLIC SURFACES SELECTED FROM THE GROUP CONSISTING OF CADMIUM AND ZINC COMPRISING DISSOLVING IN WATER A SELF-CONTAINED DRY POWDER COMPOSITION CONSISTING ESSENTIALLY OF 1.0 TO 25.0 PERCENT BY WEIGHT OF A WATER-SOLUBLE TRIVALENT CHROMIUM COMPOUND, UP TO 50.0 PERCENT BY WEIGHT OF A WATERSOLUBLE ACTIVATING SALT SELECTED FROM THE GROUP CONSISTING OF FLUORIDES, SULFATES AND THE COMBINATION THEREOF, AND 25.0 TO 95.0 PERCENT BY WEIGHT OF A WATER-SOLUBLE ACID-NITRATE COMPONENT SELECTED FROM THE GROUP CONSISTING OF UREA NITRATE, UREA NITRATE AND THE NITRATE SALTS OF INORGANIC BASES, UREA NITRATE AND SULFAMIC ACID, AND SULFAMIC ACID AND THE NITRATE SALTS OF INORGANIC BASES, SAID DRY POWDER COMPOSITION BEING ADDED IN SUFFICIENT QUANTITY TO PROVIDE 0.08 TO 5.0 GRAMS PER LITER OF TRIVALENT CHROMIUM ION AND A PH OF 0.2 TO 3.5 IN THE RESULTANT BATH AND ADDITIONALLY PROVIDING NITRATE ION AND AN ACTIVATING ION SELECTED FROM THE GROUP CONSISTING OF FLUORIDES, SULFATES AND THE COMBINATION THEREOF; MAINTAINING SAID BATH AT A TEMPERATURE OF ABOUT 45 TO 150 DEGREES FAHRENHEIT; IMMERSING A WORKPIECE HAVING A METALLIC SURFACE SELECTED FROM THE GROUP CONSISTING OF CADMIUM SURFACES AND ZINC SURFACES IN SAID BATH FOR A PERIOD OF TIME SUFFICIENT TO BRIGHTEN THE SURFACE THEREOF; AND RINSING SAID WORKPIECE IN COLD WATER.
Claim 2
Independent Claim
211 words
THE METHOD OF BRIGHTENING METALLIC SURFACES SELECTED FROM THE GROUP CONSISTING OF CADMIUM AND ZINC COMPRISING DISSOLVING IN WATER A SELF-CONTAINED DRY POWDER COMPOSITION CONSISTING ESSENTIALLY OF 1.0 TO 25.0 PERCENT BY WEIGHT OF A WATER-SOLUBLE TRIVALENT CHROMIUM COMPOUND, UP TO 50.0 PERCENT BY WEIGHT OF A WATERSOLUBLE ACTIVATING SALT SELECTED FROM THE GROUP CONSISTING OF FLUORIDES, SULFATES AND THE COMBINATION THEREOF, AND 25.0 TO 95.0 PERCENT BY WEIGHT OF A WATER-SOLUBLE ACID-NITRATE COMPONENT SELECTED FROM THE GROUP CONSISTING OF UREA NITRATE, UREA NITRATE AND THE NITRATE SALTS OF INORGANIC BASES, UREA NITRATE AND SULFAMIC ACID, AND SULFAMIC ACID AND THE NITRATE SALTS OF INORGANIC BASES, SAID DRY POWDER COMPOSITION BEING ADDED IN SUFFICIENT QUANTITY TO PROVIDE 0.08 TO 5.0 GRAMS PER LITER OF TRIVALENT CHROMIUM ION AND A PH OF 0.2 TO 3.5 IN THE RESULTANT BATH AND ADDITIONALLY PROVIDING NITRATE ION AND AN ACTIVATING ION SELECTED FROM THE GROUP CONSISTING OF FLUORIDES, SULFATES AND THE COMBINATION THEREOF; MAINTAINING SAID BATH AT A TEMPERATURE OF ABOUT 45 TO 150 DEGREES FAHRENHEIT; IMMERSING A WORKPIECE HAVING A METALLIC SURFACE SELECTED FROM THE GROUP CONSISTING OF CADMIUM SURFACES AND ZINC SURFACES IN SAID BATH FOR A PERIOD OF TIME SUFFICIENT TO BRIGHTEN THE SURFACE THEREOF; AND RINSING SAID WORKPIECE IN COLD WATER.
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |