Patent US2991684A successfully refreshed from Google Patents.
US2991684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of supervising metallurgical and metal melting processes
Assignee: Max-Planck-Institut für Nachhaltige Materialien GmbH
•
Filing: 1956-07-31
•
Granted: 1961-07-11
•
Expires: 1976-07-31
Abstract
No abstract record available.
Inventors
- 👤 Wever Franz
- 👤 Koch Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:44
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/66; G01N21/69
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD OF TESTING A METALLURGICAL PROCESS BY TAKING SAMPLES OF A MELT, MELTING SAID SAMPLES IN A VACUUM AND DETERMINING THE OXYGEN, HYDROGEN AND NITROGEN GASES CONTAINED THEREIN AND EXTRACTED BY SAID VACUUM MELTING, WHICH COMPRISES ENERGIZING SAID VACUUMEXTRACTED AND THUS LIBERATED GASES SO AS TO CAUSE THEM TO GLOW BY ACTIVATING THEM IN A GAS DISCHARGE VESSEL AT A PRESSURE OF 0.01 TO 5 MM. HG BY A CONSTANT HIGHFREQUENCY FIELD AND ANALYZING THE LIGHT EMISSION SPECTROSCOPICALLY.
Claim 2
Independent Claim
79 words
A METHOD OF TESTING A METALLURGICAL PROCESS BY TAKING SAMPLES OF A MELT, MELTING SAID SAMPLES IN A VACUUM AND DETERMINING THE OXYGEN, HYDROGEN AND NITROGEN GASES CONTAINED THEREIN AND EXTRACTED BY SAID VACUUM MELTING, WHICH COMPRISES ENERGIZING SAID VACUUMEXTRACTED AND THUS LIBERATED GASES SO AS TO CAUSE THEM TO GLOW BY ACTIVATING THEM IN A GAS DISCHARGE VESSEL AT A PRESSURE OF 0.01 TO 5 MM. HG BY A CONSTANT HIGHFREQUENCY FIELD AND ANALYZING THE LIGHT EMISSION SPECTROSCOPICALLY.
References Cited (Backward Citations)
GB329111A
Cited
US2393650A
Cited
US2339754A
Cited
US2544078A
Cited
US2670649A
Cited
GB706535A
Cited
US2708387A
Cited
US2795132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |