Patent US2854497A successfully refreshed from Google Patents.
US2854497A
Expired / Lapsed
US
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Inhibition of hastelloy b corrosion
Assignee: California Research LLC
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Filing: 1955-11-07
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Granted: 1958-09-30
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Expires: 1975-11-07
Abstract
No abstract record available.
Inventors
- 👤 Robert L Piehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:12
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
AN ORGANIC CONVERSION PROCESS WHEREIN A HASTELLOY B ALLOY IS IN CONTACT WITH LIQUID PHOSPHORIC ACID AT SUCH ACID TEMPERATURE AND CONCENTRATION COMBINATION OF AT LEAST 290*F. AND 70% (CALCULATED AS ORTHO-PHOSPHORIC ACID), RESPECTIVELY, THAT ADDITION OF SOME QUANTITIES OF CUPRIC ION TO SAID ACID WILL REDUCE THE RATE OF
Claim 2
Dependent Claim
50 words
AN ORGANIC CONVERSION PROCESS WHEREIN A HASTELLOY B ALLOY IS IN CONTACT WITH LIQUID PHOSPHORIC ACID AT SUCH ACID TEMPERATURE AND CONCENTRATION COMBINATION OF AT LEAST 290*F. AND 70% (CALCULATED AS ORTHO-PHOSPHORIC ACID), RESPECTIVELY, THAT ADDITION OF SOME QUANTITIES OF CUPRIC ION TO SAID ACID WILL REDUCE THE RATE OF
References Cited (Backward Citations)
US2547013A
Cited
US2653177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |