US3147204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodic prevention of hydrogen embrittlement of metals
Assignee: Chemical Construction Corp
•
Filing: 1960-02-25
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Granted: 1964-09-01
•
Expires: 1980-02-25
Abstract
No abstract record available.
Inventors
- 👤 Spencer W Shepard
- 👤 Charles K Aldrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:34
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN THE PROCESS OF ACRYLONITRILE SYNTHESIS, THE METHOD OF PREVENTING HYDROGEN DEPOSITION OF FERROUS METAL SURFACES IN CONTACT WTIH ACRYLONITRILE SOLUTION, WHICH COMPRISES IMMERSING AN INERT ELECTRICAL CONDUCTOR IN SAID ACRYLONITRILE SOLUTION, AND ESTABLISHING AN ELECTRICAL POTENTIAL IN THE RANGE OF 1 TO 10 VOLTS BETWEEN SAID CONDUCTOR AND SAID FERROUS METAL SURFACE, WHEREBY SAID SURFACE IS MAINTAINED CONTINUOUSLY ANODIC IN ELECTRICAL POTENTIAL RELATIVE TO SAID SOLUTION, SAID ELECTRICAL POTENTIAL SERVINCE TO ESTABLISH A CURREN DENSITY SUCH THAT THE FERROUS METAL SURFACE IS CONTINUOUSLY DISSOLVED INTO SAID SOLUTION BY INDUCED CORROSION, SAID INDUCE CORROSION BEING OF A SMALL AND ESSENTIALLY NEGLIGIBLE ORDER OF MAGNITUDE.
Claim 2
Dependent Claim
104 words
IN THE PROCESS OF ACRYLONITRILE SYNTHESIS, THE METHOD OF PREVENTING HYDROGEN DEPOSITION OF FERROUS METAL SURFACES IN CONTACT WTIH ACRYLONITRILE SOLUTION, WHICH COMPRISES IMMERSING AN INERT ELECTRICAL CONDUCTOR IN SAID ACRYLONITRILE SOLUTION, AND ESTABLISHING AN ELECTRICAL POTENTIAL IN THE RANGE OF 1 TO 10 VOLTS BETWEEN SAID CONDUCTOR AND SAID FERROUS METAL SURFACE, WHEREBY SAID SURFACE IS MAINTAINED CONTINUOUSLY ANODIC IN ELECTRICAL POTENTIAL RELATIVE TO SAID SOLUTION, SAID ELECTRICAL POTENTIAL SERVINCE TO ESTABLISH A CURREN DENSITY SUCH THAT THE FERROUS METAL SURFACE IS CONTINUOUSLY DISSOLVED INTO SAID SOLUTION BY INDUCED CORROSION, SAID INDUCE CORROSION BEING OF A SMALL AND ESSENTIALLY NEGLIGIBLE ORDER OF MAGNITUDE.
References Cited (Backward Citations)
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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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |