US2886497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining the permeability of steel to hydrogen
Assignee: United States Steel Corp
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Filing: 1957-04-12
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Granted: 1959-05-12
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Expires: 1977-04-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:23
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N33/00; G01N33/20; G01N33/204
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF OBTAINING AN INDICATION OF THE RELATIVE PERMEABILITY OF A STEEL SPECIMEN TO ATOMIC HYDROGEN WHICH COMPRISES APPLYING A PASSIVATING BATH TO ONE BATH OF SAID SPECIMEN TO FORM A PASSIVE FILM OF IRON OXIDE THEREON, COMPARING THE POTENTIAL OF SAID ONE SIDE WITH RESPECT TO THE POTENTIAL OF A STANDARD REFERENCE ELECTRODE IMMERSED IN SAID BATH, SUBJECTING THE OPPOSITE SIDE OF SAID SPECIMEN TO THE ACTION OF ATOMIC HYDROGEN, AND MEASURING THE TIME INTERVAL REQUIRED FOR SAID HYDROGEN TO EFFECT A CHANGE IN THE POTENTIAL OF SAID ONE SIDE RELATIVE TO SAID ELECTRODE.
Claim 2
Independent Claim
96 words
A METHOD OF OBTAINING AN INDICATION OF THE RELATIVE PERMEABILITY OF A STEEL SPECIMEN TO ATOMIC HYDROGEN WHICH COMPRISES APPLYING A PASSIVATING BATH TO ONE BATH OF SAID SPECIMEN TO FORM A PASSIVE FILM OF IRON OXIDE THEREON, COMPARING THE POTENTIAL OF SAID ONE SIDE WITH RESPECT TO THE POTENTIAL OF A STANDARD REFERENCE ELECTRODE IMMERSED IN SAID BATH, SUBJECTING THE OPPOSITE SIDE OF SAID SPECIMEN TO THE ACTION OF ATOMIC HYDROGEN, AND MEASURING THE TIME INTERVAL REQUIRED FOR SAID HYDROGEN TO EFFECT A CHANGE IN THE POTENTIAL OF SAID ONE SIDE RELATIVE TO SAID ELECTRODE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |