US2952590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for chromium plating
Assignee: Primerica Inc
•
Filing: 1959-08-14
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Granted: 1960-09-13
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Expires: 1979-08-14
Abstract
No abstract record available.
Inventors
- 👤 Jesse E Stareck
- 👤 Jr Edgar J Seyb
- 👤 Johnson Andy Albert
- 👤 William H Rowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:16
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PROCESS FOR ELECTRODEPOSITING BRIGHT CRACK-FREE CHROMIUM TO A THICKNESS OF AT LEAST 0.00005 INCH ON A METAL CATHODE COMPRISING PASSING CURRENT FROM AN ANODE TO SAID CATHODE IMMERSED IN AN AQUEOUS CHROMIUM PLATING BATH AT A TEMPERATURE BETWEEN 95*F. AND 140*F., SAID BATH CONTAINING LESS THAN 0.05 G./L. OF CHLORIDE ION AND COMPRISING ESSENTAILLY BETWEEN 100 G./L. AND 500 G./L OF CRO3, A TOTAL CATALYST ION CONCENTRATION OF SULFATE IONS AND AT LEAST ONE COMPLEX ION SELECTED FROM THE CLASS CONSISTING OF FLUOALUMINATE, FLUOZIRCONATE, AND FLUOTITANATE, TO ACHIEVE A RATIO OF CRO3 CONCENTRATION TO TOTAL CATALYST ION CONCENTRATION BETWEEN 70:1 AND 150:1, THE SULFATE ION CONTENT BEING BETWEEN 5% AND 85% OF THE TOTAL CATALYST CONCENTRATION, THE CRO3 CONCENTRATION, RATIO AND TEMPERATURE HAVING A RELATIONSHIP DEFINED BY THE AREA ENCLOSED BY THE CURVE ABCDE IN FIGURE 1.
Claim 2
Dependent Claim
138 words
A PROCESS FOR ELECTRODEPOSITING BRIGHT CRACK-FREE CHROMIUM TO A THICKNESS OF AT LEAST 0.00005 INCH ON A METAL CATHODE COMPRISING PASSING CURRENT FROM AN ANODE TO SAID CATHODE IMMERSED IN AN AQUEOUS CHROMIUM PLATING BATH AT A TEMPERATURE BETWEEN 95*F. AND 140*F., SAID BATH CONTAINING LESS THAN 0.05 G./L. OF CHLORIDE ION AND COMPRISING ESSENTAILLY BETWEEN 100 G./L. AND 500 G./L OF CRO3, A TOTAL CATALYST ION CONCENTRATION OF SULFATE IONS AND AT LEAST ONE COMPLEX ION SELECTED FROM THE CLASS CONSISTING OF FLUOALUMINATE, FLUOZIRCONATE, AND FLUOTITANATE, TO ACHIEVE A RATIO OF CRO3 CONCENTRATION TO TOTAL CATALYST ION CONCENTRATION BETWEEN 70:1 AND 150:1, THE SULFATE ION CONTENT BEING BETWEEN 5% AND 85% OF THE TOTAL CATALYST CONCENTRATION, THE CRO3 CONCENTRATION, RATIO AND TEMPERATURE HAVING A RELATIONSHIP DEFINED BY THE AREA ENCLOSED BY THE CURVE ABCDE IN FIGURE 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) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |