Patent US2916458A successfully refreshed from Google Patents.
US2916458A
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Pickling solution
Assignee: Aerojet Rocketdyne Inc
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Filing: 1954-11-12
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Granted: 1959-12-08
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Expires: 1974-11-12
Abstract
No abstract record available.
Inventors
- 👤 Bobby L Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:06
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/086; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PICKLING SOLUTION CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID IN AN AMOUNT OF FROM ABOUT 30% TO ABOUT 50% BY VOLUME OF THE TOTAL VOLUME OF THE SOLUTION AND FROM ABOUT 10% TO ABOUT 35% NITRIC ACID BY VOLUME OF THE TOTAL VOLUME OF THE SOLUTION.
Claim 2
Dependent Claim
49 words
A PICKLING SOLUTION CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID IN AN AMOUNT OF FROM ABOUT 30% TO ABOUT 50% BY VOLUME OF THE TOTAL VOLUME OF THE SOLUTION AND FROM ABOUT 10% TO ABOUT 35% NITRIC ACID BY VOLUME OF THE TOTAL VOLUME OF THE SOLUTION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |