Patent US2548187A successfully refreshed from Google Patents.
US2548187A
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Method of determining the oxygen content of copper
Assignee: AT&T Inc
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Filing: 1945-07-19
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Granted: 1951-04-10
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Expires: 1965-07-19
Abstract
No abstract record available.
Inventors
- 👤 Carl M Anderson
- 👤 Robert A Harris
- 👤 Charles C Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:17
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/20; G01N33/202; G01N33/2022; G01N33/2025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF DETERMINING THE DELETERIOUS EFFECT OF THE OXYGEN CONTENT OF COPPER WHICH COMPRISES DETERMINING THE DIMENSIONS OF A SAMPLE OF COPPER, HEATING SAID SAMPLE TO FROM APPROXIMATELY 1550* F. TO APPROXIMATELY 1850* F. FOR FROM FIFTEEN TO TWENTY MINUTES, COOLING THE SAMPLE TO ROOM TEMPERATURE, MAINTAINING A HYDROGEN ATMOSPHERE AROUND THE SAMPLE DURING THE HEATING AND COOLING, AND THEN AGAIN DETERMINING SAID DIMENSIONS TO INDICATE VARIATIONS IN SAID MEASUREMENT ABOVE AND BELOW 20% OF THE ORIGINAL DIMENSIONS.
Claim 2
Independent Claim
79 words
THE METHOD OF DETERMINING THE DELETERIOUS EFFECT OF THE OXYGEN CONTENT OF COPPER WHICH COMPRISES DETERMINING THE DIMENSIONS OF A SAMPLE OF COPPER, HEATING SAID SAMPLE TO FROM APPROXIMATELY 1550* F. TO APPROXIMATELY 1850* F. FOR FROM FIFTEEN TO TWENTY MINUTES, COOLING THE SAMPLE TO ROOM TEMPERATURE, MAINTAINING A HYDROGEN ATMOSPHERE AROUND THE SAMPLE DURING THE HEATING AND COOLING, AND THEN AGAIN DETERMINING SAID DIMENSIONS TO INDICATE VARIATIONS IN SAID MEASUREMENT ABOVE AND BELOW 20% OF THE ORIGINAL DIMENSIONS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |