US2879186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for blanching zirconium
Assignee: AG fur UNTERNEHMUNGEN DER EISEN- und STAHLINDUSTRIE
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Filing: 1957-06-07
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Granted: 1959-03-24
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Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 Fischer Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:24
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/28; C23G1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PROCESS FOR CLEANING ZIRCONIUM METAL SURFACES BY REMOVING SCALE LAYERS THEREFROM, COMPRISING THE STEPS OF PREPARING A MOLTEN BATH OF AN ALKALI METAL HYDROGEN FLUORIDE SALT AND DIPPING THEREIN THE SURFACE TO BE CLEANED.
Claim 2
Dependent Claim
35 words
A PROCESS FOR CLEANING ZIRCONIUM METAL SURFACES BY REMOVING SCALE LAYERS THEREFROM, COMPRISING THE STEPS OF PREPARING A MOLTEN BATH OF AN ALKALI METAL HYDROGEN FLUORIDE SALT AND DIPPING THEREIN THE SURFACE TO BE CLEANED.
References Cited (Backward Citations)
US2711389A
Cited
US2711364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |