US2958610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-plating treatment of aluminous surfaces
Assignee: Reynolds Metals Co
•
Filing: 1957-10-07
•
Granted: 1960-11-01
•
Expires: 1977-10-07
Abstract
No abstract record available.
Inventors
- 👤 Ernest R Ramirez
- 👤 Erik F Barkman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:10
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/42; C25D5/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
IN THE CHEMICAL PLATING OF ALUMINUM AND ALUMINUM ALLOYS BY THE SEQUENTIAL PROCEDURE OF ALKALINE ETCHING, PRETREAT RINSING AND CHEMICAL HYPOPHOSPHITE PLATING, THE STEP WHICH CONSISTS IN PRETREAT RINSING SAID ALUMINUM WITH AN AQUEOUS BATH CONSISTING RINSING SAID OF AMMONIA IN THE RANGE OF ABOUT 0.1 TO ABOUT 30 PARTS BY WEIGHT AND A COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF AMINOCARBOXYLIC ACIDS, ALAKLINE EARTH METAL SALTS OF AMINOCARBOXYLIC ACIDS, AMMONIUM SALTS OF ALIPHATIC HYDROXYCARBOXYLIC ACIDS, ALIPHATIC HYDROXYCARBOXYLIC ACIDS, ALKALI METAL SALTS OF ALIPHATIC HYDROXYCARBOXYLIC ACIDS AND ALKALINE EARTH METAL SALTS OF ALIPHATIC HYDROXYCARBOXYLIC ACIDS IN THE RANGE OF ABOUT 0.1 TO 5 PARTS BY WEIGHT.
References Cited (Backward Citations)
US2776918A
Cited
US2772183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |