US2655439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compounded fluoborate chemical surface treatment of aluminum and aluminum alloys
Assignee: Teledyne Ryan Aeronautical Corp
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Filing: 1952-12-15
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Granted: 1953-10-13
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Expires: 1972-12-15
Abstract
No abstract record available.
Inventors
- 👤 Bernard W Floersch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:43
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/20; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR SURFACE TREATMENT OF ALUMINUM AND ALUMINUM ALLOY MATERIAL TO REMOVE OXIDES AND SURFACE CONTAMINATION ENCOUNTERED IN FORMING OPERATIONS, COMPRISING PRE-CLEANING THE MATERIAL WITH AN ALKALINE SOLUTION, THEN IMMERSING THE MATERIAL IN AN ETCH CONSISTING OF 0.1% TO 1.0% OF CHROMIC ACID, 0.5% TO 6.0% OF SODIUM FLUOBORATE AND 2.0% TO 12.0% OF NITRIC ACID, SAID PERCENTAGES BEING BY WEIGHT, AND THEN POST-ETCHING THE MATERIAL WITH A SOLUTION OF FLUOSILICIC ACID.
Claim 2
Dependent Claim
73 words
A PROCESS FOR SURFACE TREATMENT OF ALUMINUM AND ALUMINUM ALLOY MATERIAL TO REMOVE OXIDES AND SURFACE CONTAMINATION ENCOUNTERED IN FORMING OPERATIONS, COMPRISING PRE-CLEANING THE MATERIAL WITH AN ALKALINE SOLUTION, THEN IMMERSING THE MATERIAL IN AN ETCH CONSISTING OF 0.1% TO 1.0% OF CHROMIC ACID, 0.5% TO 6.0% OF SODIUM FLUOBORATE AND 2.0% TO 12.0% OF NITRIC ACID, SAID PERCENTAGES BEING BY WEIGHT, AND THEN POST-ETCHING THE MATERIAL WITH A SOLUTION OF FLUOSILICIC ACID.
References Cited (Backward Citations)
US2465750A
Cited
US2637634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |