US3669758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing contaminants from zirconium surfaces
Assignee: General Electric Co
•
Filing: 1968-03-20
•
Granted: 1972-06-13
•
Expires: 1988-03-20
Abstract
Abstract A PROCESS FOR REMOVING RESIDUAL CONTAMINANTS, SUCH AS FULORIDES REMAINING AFTER ACID ETCHING, FROM ZIRCONIUM ALLOY SURFACES. THIS PROCESS IS ESPECIALL USEFUL IN THE FABRICATION OF FUEL RODS FOR NUCLEAR REACTORS IN WHICH FUEL MATERIAL IS ENCASED IN ZIRCONIUM ALLOY TUBES. IN A PREFFERRD EMBODIMENT, THE SURFACE IS TREATED WITH SODIUM HYDROXIDE AT ELEAVATED TEMPERATURE, RINSED WITH WATER AND, IF DESIRED, PREOXIDIZED.
Inventors
- 👤 Charles R Konecny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:19
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C23G1/20; C23G1/205; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/26; G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/06; G21C3/07; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |