US2811650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiological wear measurement method
Assignee: Shell Development Co
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Filing: 1953-11-13
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Granted: 1957-10-29
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Expires: 1973-11-13
Abstract
No abstract record available.
Inventors
- 👤 Charles D Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:58
CPC Classifications
G; G01; G01N; G01N23/00; G01N2223/00; G01N2223/10; G01N2223/101; G01N2223/1013; G01N2223/60; G01N2223/634
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
THE METHOD OF DETERMINING THE RESPECTIVE WEAR OF TWO METALLIC MEMBERS IN MOVING CONTACT WITH EACH OTHER, COMPRISING THE STEPS OF SUBJECTING SAID TWO MEMBERS TO A RADIOACTIVATION TREATMENT ADAPTED TO TRANSFORM A PART OF THE MATERIAL OF THE FIRST MEMBER INTO AN ISOTOPE HAVING A PREDETERMINED VALUE OF GAMMA RAY ENERGY, AND A PART OF THE MATERIAL OF THE SECOND MEMBER IS TRANSFORMED INTO AN ISOTOPE HAVING A VALUE OF GAMMA RAY ENERGY DIFFERENT FROM SAID FIRST VALUE, SUBJECTING SAID TWO MEMBERS TO MUTUAL ATTRITION IN THE PRESENCE OF A FLUID CAPABLE OF CARRYING RADIOACTIVE WEAR DEBRIS, MEASURING THE GAMMA RADIOACTIVITY OF THE FLUID CARRYING SAID DEBRIS DUE TO THE PRESENCE THEREIN OF THE FIRST ISOTOPE, AND MEASURING THE GAMMA RADIOACTIVITY OF THE FLUID CARRYING SAID DEBRIS DUE TO THE PRESENCE THEREIN OF THE SECOND INSOTOPE.
Claim 2
Independent Claim
137 words
THE METHOD OF DETERMINING THE RESPECTIVE WEAR OF TWO METALLIC MEMBERS IN MOVING CONTACT WITH EACH OTHER, COMPRISING THE STEPS OF SUBJECTING SAID TWO MEMBERS TO A RADIOACTIVATION TREATMENT ADAPTED TO TRANSFORM A PART OF THE MATERIAL OF THE FIRST MEMBER INTO AN ISOTOPE HAVING A PREDETERMINED VALUE OF GAMMA RAY ENERGY, AND A PART OF THE MATERIAL OF THE SECOND MEMBER IS TRANSFORMED INTO AN ISOTOPE HAVING A VALUE OF GAMMA RAY ENERGY DIFFERENT FROM SAID FIRST VALUE, SUBJECTING SAID TWO MEMBERS TO MUTUAL ATTRITION IN THE PRESENCE OF A FLUID CAPABLE OF CARRYING RADIOACTIVE WEAR DEBRIS, MEASURING THE GAMMA RADIOACTIVITY OF THE FLUID CARRYING SAID DEBRIS DUE TO THE PRESENCE THEREIN OF THE FIRST ISOTOPE, AND MEASURING THE GAMMA RADIOACTIVITY OF THE FLUID CARRYING SAID DEBRIS DUE TO THE PRESENCE THEREIN OF THE SECOND INSOTOPE.
References Cited (Backward Citations)
US2315845A
Cited
US2751506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |