US3264219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of pickling and chemically milling zirconium and zirconium alloys
Assignee: Lockheed Martin Corp
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Filing: 1963-02-14
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Granted: 1966-08-02
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Expires: 1983-02-14
Abstract
No abstract record available.
Inventors
- 👤 John W Mcgrew
- 👤 Jakobson Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:08
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A CONTROLLED CHEMICAL MILLING PROCESS FOR THE SURFACE TREATMENT OF ZIRCONIUM AND ZIRCONIUM ALLOYS TO REMOVE PRECISE AMOUNTS OF METAL AND SCALE THEREFROM WHICH COMPRISES IMMERSING AND CHEMICALLY MILLING THE METAL TO A DESIRED SMALLER DIMENSION IN A TREATING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING BETWEEN ABOUT 5% AND ABOUT 25% BY WEIGHT OF A MEMBER OF THE GROUP CONSISTING OF SULFAMIC ACID AND ITS ALKALI METAL SALTS AND BETWEEN ABOUT 1% AND ABOUT 6% BY WEIGHT OF AN ALKALI METAL FLUORIDE, THE AMOUNT OF SULFAMIC ACID PRESENT BEING IN EXCESS OF THE AMOUNT OF ALKALI METAL FLUORIDE.
Claim 2
Dependent Claim
100 words
A CONTROLLED CHEMICAL MILLING PROCESS FOR THE SURFACE TREATMENT OF ZIRCONIUM AND ZIRCONIUM ALLOYS TO REMOVE PRECISE AMOUNTS OF METAL AND SCALE THEREFROM WHICH COMPRISES IMMERSING AND CHEMICALLY MILLING THE METAL TO A DESIRED SMALLER DIMENSION IN A TREATING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING BETWEEN ABOUT 5% AND ABOUT 25% BY WEIGHT OF A MEMBER OF THE GROUP CONSISTING OF SULFAMIC ACID AND ITS ALKALI METAL SALTS AND BETWEEN ABOUT 1% AND ABOUT 6% BY WEIGHT OF AN ALKALI METAL FLUORIDE, THE AMOUNT OF SULFAMIC ACID PRESENT BEING IN EXCESS OF THE AMOUNT OF ALKALI METAL FLUORIDE.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |