US3108933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for chromium plating
Assignee: M&T Chemicals Inc
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Filing: 1961-02-28
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Granted: 1963-10-29
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Expires: 1981-02-28
Abstract
No abstract record available.
Inventors
- 👤 Johnson Andy Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:27
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A PROCESS FOR ELECTRODEPOSITING CRACK-FREE CHROMIUM FROM AN AQUEOUS BATH AT A TEMPERATURE OF AT LEAST 115*F. AND CONTAINING BETWEEN 100 G./L. AND 500 G./L. OF CRO3, AT LEAST ONE CATALYST ION SELECTED FROM THE CLASS CONSISTING OF SULFATE, SILICOFLUORIDE, FLUOALUMINATE, FLUOTITANATE, AND FLUOZZIRCONATE, IN AN AMOUNT BETWEEN 0.5 G./L. AND 3.5 G./L., AND HAVING A RATIO OF CRO3 TO TOTAL CATALYST IONS OF BETWEEN ABOUT 85:1 TO 150:1, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID BATH SUFFICIENT LITHIUM SO THAT THE BATH CONTAINS AT LEAST 1 G./L. OF LITHIUM ION.
Claim 2
Dependent Claim
92 words
IN A PROCESS FOR ELECTRODEPOSITING CRACK-FREE CHROMIUM FROM AN AQUEOUS BATH AT A TEMPERATURE OF AT LEAST 115*F. AND CONTAINING BETWEEN 100 G./L. AND 500 G./L. OF CRO3, AT LEAST ONE CATALYST ION SELECTED FROM THE CLASS CONSISTING OF SULFATE, SILICOFLUORIDE, FLUOALUMINATE, FLUOTITANATE, AND FLUOZZIRCONATE, IN AN AMOUNT BETWEEN 0.5 G./L. AND 3.5 G./L., AND HAVING A RATIO OF CRO3 TO TOTAL CATALYST IONS OF BETWEEN ABOUT 85:1 TO 150:1, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID BATH SUFFICIENT LITHIUM SO THAT THE BATH CONTAINS AT LEAST 1 G./L. OF LITHIUM ION.
References Cited (Backward Citations)
GB299395A
Cited
US2916424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |