US3129149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium plating process
Assignee: M&T Chemicals Inc
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Filing: 1961-05-08
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Granted: 1964-04-14
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Johnson Andy Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:52
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/38; C25D5/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A PROCESS FOR ELECTROPLATING CHROMIUM OVER A NICKEL SURFACE. THE IMPROVEMENT COMPRISING IMMERSING A NICKEL SURFACED ARTICLE IN AN AQUEOUS CARBOXYLIC ACID BATH CONSISTING ESSENTIALLY OF BETWEEN 1G./L. AND 100 G./L. OF AT LEAST ONE DICARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF OXALIC ACID, MALONIC ACID, TARTRONIC ACID, MESOXALIC ACID, SUCCINIC ACID, MALIC ACID, TARTARIC ACID, GLUTARIC ACID AND ADIPIC ACID; AND REMOVING SAID NICKEL SURFACED ARTICLE FROM SAID AQUEOUS BATH; AND INSERTING SAID NICKEL SURFACED ARTICLE INTO A CHROMIUM PLATING BATH AND ELECTRODEPOSITING CHROMIUM ON SAID ARTICLE.
Claim 2
Dependent Claim
90 words
IN A PROCESS FOR ELECTROPLATING CHROMIUM OVER A NICKEL SURFACE. THE IMPROVEMENT COMPRISING IMMERSING A NICKEL SURFACED ARTICLE IN AN AQUEOUS CARBOXYLIC ACID BATH CONSISTING ESSENTIALLY OF BETWEEN 1G./L. AND 100 G./L. OF AT LEAST ONE DICARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF OXALIC ACID, MALONIC ACID, TARTRONIC ACID, MESOXALIC ACID, SUCCINIC ACID, MALIC ACID, TARTARIC ACID, GLUTARIC ACID AND ADIPIC ACID; AND REMOVING SAID NICKEL SURFACED ARTICLE FROM SAID AQUEOUS BATH; AND INSERTING SAID NICKEL SURFACED ARTICLE INTO A CHROMIUM PLATING BATH AND ELECTRODEPOSITING CHROMIUM ON SAID ARTICLE.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |