US2746831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cleaning electrodes
Assignee: International Business Machines Corp
•
Filing: 1952-08-27
•
Granted: 1956-05-22
•
Expires: 1972-08-27
Abstract
No abstract record available.
Inventors
- 👤 Edward B Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:13
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/50; H01J9/505; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN THE MANUFACTURE OF A GASEOUS DISCHARGE TUBE HAVING AT LEAST TWO METALLIC ELECTRODES TO BE ENCLOSED IN AN OUTER ENVELOPE THE PROCESS OF ELIMINATING IMPURITIES FROM THE ELECTRODES INCLUDING THE FOLLOWING STEPS; EVACUATING SAID ENVELOPE WHILE HEATING SAID ENVELOPE TO A TEMPERATURE LESS THAN THE MELTING POINT THEREOF TO THEREBY EFFECT A CLEANING THEREOF AND LIBERATION OF OCCLUDED GASES THEREFROM; INJECTING NEON INTO SAID TUBE UNTIL A PREDETERMINED PRESSURE IS REALIZED; APPLYING AN ALTERNATING CURRENT VOLTAGE OF BETWEEN 200 AND 250 VOLTS ACROSS SAID ELECTRODES TO IONIZE SAID NEON UNTIL THE TEMPERATURE OF SAID ELECTRODE AND SAID ENVELOPE APPROACH A STATE OF SUBSTANTIAL THERMAL
Claim 2
Dependent Claim
105 words
IN THE MANUFACTURE OF A GASEOUS DISCHARGE TUBE HAVING AT LEAST TWO METALLIC ELECTRODES TO BE ENCLOSED IN AN OUTER ENVELOPE THE PROCESS OF ELIMINATING IMPURITIES FROM THE ELECTRODES INCLUDING THE FOLLOWING STEPS; EVACUATING SAID ENVELOPE WHILE HEATING SAID ENVELOPE TO A TEMPERATURE LESS THAN THE MELTING POINT THEREOF TO THEREBY EFFECT A CLEANING THEREOF AND LIBERATION OF OCCLUDED GASES THEREFROM; INJECTING NEON INTO SAID TUBE UNTIL A PREDETERMINED PRESSURE IS REALIZED; APPLYING AN ALTERNATING CURRENT VOLTAGE OF BETWEEN 200 AND 250 VOLTS ACROSS SAID ELECTRODES TO IONIZE SAID NEON UNTIL THE TEMPERATURE OF SAID ELECTRODE AND SAID ENVELOPE APPROACH A STATE OF SUBSTANTIAL THERMAL
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |