Patent US2820692A successfully refreshed from Google Patents.
US2820692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dissolving zirconium alloys
Assignee: Individual
•
Filing: 1955-07-14
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Granted: 1958-01-21
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Expires: 1975-07-14
Abstract
No abstract record available.
Inventors
- 👤 Roberta S Shor
- 👤 Vogler Sevmour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:33
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS OF COMPLETELY DISSOLVING ZIRCONIUM AND URANIUM FROM MASSIVE ZIRCONIUM-BASE ALLOYS CONTAINING URANIUM IN AN AMOUNT UP TO ABOUT 2% BY WEIGHT BASED ON THE ZIRCONIUM CONTENT, CONSISTING OF CONTACTING SAID ALLOYS WITH A SOLUTION CONSISTING OF WATER AND HYDROFLUORIC ACID IN A QUANTITY OF BETWEEN STOICHIOMETRIC AMOUNT AND APPROXIMATELY 10% EXCESS HYDROFLUORIC ACID OVER THE AMOUNT STOICHIOMETRICALLY REQUIRED, SAID HYDROFLUORIC ACID SOLUTION HAVING A MOLARITY BETWEEN 2 M AND ABOUT 10 M.
Claim 2
Dependent Claim
74 words
A PROCESS OF COMPLETELY DISSOLVING ZIRCONIUM AND URANIUM FROM MASSIVE ZIRCONIUM-BASE ALLOYS CONTAINING URANIUM IN AN AMOUNT UP TO ABOUT 2% BY WEIGHT BASED ON THE ZIRCONIUM CONTENT, CONSISTING OF CONTACTING SAID ALLOYS WITH A SOLUTION CONSISTING OF WATER AND HYDROFLUORIC ACID IN A QUANTITY OF BETWEEN STOICHIOMETRIC AMOUNT AND APPROXIMATELY 10% EXCESS HYDROFLUORIC ACID OVER THE AMOUNT STOICHIOMETRICALLY REQUIRED, SAID HYDROFLUORIC ACID SOLUTION HAVING A MOLARITY BETWEEN 2 M AND ABOUT 10 M.
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |