US2841540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical composition for chromium plating
Assignee: Diamond Shamrock Corp
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Filing: 1955-10-28
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Granted: 1958-07-01
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Expires: 1975-10-28
Abstract
No abstract record available.
Inventors
- 👤 Robert C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:06
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J27/00; B01J27/06; B01J37/00; B01J37/34
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
37 words
THE REACTION PRODUCT OBTAINED BY CHEMICALLY REACTING A CHROMIUM COMPOUND, AN ORGANIC REDUCING AGENT AND FLUOSILICIC ACID IN AMOUNTS SUFFICIENT TO YIELD A MATERIAL CONTAINING ABOUT 23 TO 28% CHROMIUM, 2.5 TO 7.75% SILICON AND 24-36% FLUORINE.
Claim 2
Dependent Claim
37 words
THE REACTION PRODUCT OBTAINED BY CHEMICALLY REACTING A CHROMIUM COMPOUND, AN ORGANIC REDUCING AGENT AND FLUOSILICIC ACID IN AMOUNTS SUFFICIENT TO YIELD A MATERIAL CONTAINING ABOUT 23 TO 28% CHROMIUM, 2.5 TO 7.75% SILICON AND 24-36% FLUORINE.
Claim 3
Dependent Claim
53 words
IN THE PROCESS OF ELECTRODEPOSITING CHROMIUM FROM AN AQUEOUS ELECTROLYTE CONTAINING CHROMIUM IONS, AND IONS OF AN INORGANIC ACID, THE IMPROVEMENT WHICH INCLUDES INCORPORATING INTO SAID ELECTROLYTE AN AMOUNT OF THE PRODUCT DEFINED BY CLAIM 1 SUCH THAT THE FLUORINE CONTENT OF SAID ELECTROLYTE IS FROM ABOUT 0.5 TO 7.0 GRAMS PER LITER.
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) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |