US2656256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of testing a metallic sample
Assignee: Individual
•
Filing: 1946-03-18
•
Granted: 1953-10-20
•
Expires: 1966-03-18
Abstract
No abstract record available.
Inventors
- 👤 Max L Yeater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:10
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/20; G01N33/204; G01N33/2045; Y; Y10; Y10T; Y10T436/00; Y10T436/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF TESTING METALLIC SAMPLE TO DETERMINE THE PRESENCE OF OCCLUDED IMPURITIES WHICH CAN REACT WITH ATOMIC HYDROGEN TO FORM A VOLATILE COMPOUND WHICH COMPRISES, HEATING THE SAMPLE IN THE VACUUM TO DRIVE OFF RESIDUAL GASES, ENCLOSING SAID HEATED SAMPLE IN A LOW PRESSURE ATMOSPHERE OF MOLECULAR HYDROGEN GAS, IONIZING SAID GAS TO FORM ATOMIC HYDROGEN, COOLING SAID SAMPLE TO ROOM TEMPERATURE WHILE MAINTAINING CONSTANT THE PRESSURE OF SAID MOLECULAR HYDROGEN GAS ATMOSPHERE, REHEATING SAID SAMPLE IN SAID HYDROGEN GAS ATMOSPHERE, AND APPLYING RADIO FREQUENCY POWER TO CAUSE AN ELECTRIC GLOW DISCHARGE IN SAID LOW PRESSURE HYDROGEN ATMOSPHERE.
Claim 2
Independent Claim
99 words
A METHOD OF TESTING METALLIC SAMPLE TO DETERMINE THE PRESENCE OF OCCLUDED IMPURITIES WHICH CAN REACT WITH ATOMIC HYDROGEN TO FORM A VOLATILE COMPOUND WHICH COMPRISES, HEATING THE SAMPLE IN THE VACUUM TO DRIVE OFF RESIDUAL GASES, ENCLOSING SAID HEATED SAMPLE IN A LOW PRESSURE ATMOSPHERE OF MOLECULAR HYDROGEN GAS, IONIZING SAID GAS TO FORM ATOMIC HYDROGEN, COOLING SAID SAMPLE TO ROOM TEMPERATURE WHILE MAINTAINING CONSTANT THE PRESSURE OF SAID MOLECULAR HYDROGEN GAS ATMOSPHERE, REHEATING SAID SAMPLE IN SAID HYDROGEN GAS ATMOSPHERE, AND APPLYING RADIO FREQUENCY POWER TO CAUSE AN ELECTRIC GLOW DISCHARGE IN SAID LOW PRESSURE HYDROGEN ATMOSPHERE.
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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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |