US3089944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc welding
Assignee: Airco Inc
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Filing: 1962-01-19
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Granted: 1963-05-14
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Expires: 1982-01-19
Abstract
No abstract record available.
Inventors
- 👤 Mathews Howard Hume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:20
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/06; B23K9/067; B23K9/0672
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD OF REDUCING THE TIME LAG IN STARTING AN ELECTRIC POWER ARC IN A STABLE GAS AT ATMOSPHERIC PRESSURE ACROSS A GAP BETWEEN COOPERATING ELECTRODES WHICH ARE CONNECTED IN CIRCUIT WITH A SOURCE OF VOLTAGE WHICH WILL MAINTAIN AN ARC ACROSS SAID GAP AFTER IT HAS BEEN INITIATED, SAID METHOD COMPRISING SUPPLYING A RADIOACTIVE GAS TO SAID GAP BETWEEN SAID ELECTRODES IN SUFFICIENT QUANTITY TO PRODUCE ARC STARTING IONIZATION OF THE STABLE GASEOUS MEDIUM IN SAID GAP AND THE CONSEQUENT PROMPT INITIATION OF AN ARC ACROSS SAID GAP AND INTERRUPTING SAID SUPPLY OF RADIOACTIVE GAS TO SAID GAP AFTER SAID ARC HAS BEEN INITIATED.
Claim 2
Independent Claim
105 words
THE METHOD OF REDUCING THE TIME LAG IN STARTING AN ELECTRIC POWER ARC IN A STABLE GAS AT ATMOSPHERIC PRESSURE ACROSS A GAP BETWEEN COOPERATING ELECTRODES WHICH ARE CONNECTED IN CIRCUIT WITH A SOURCE OF VOLTAGE WHICH WILL MAINTAIN AN ARC ACROSS SAID GAP AFTER IT HAS BEEN INITIATED, SAID METHOD COMPRISING SUPPLYING A RADIOACTIVE GAS TO SAID GAP BETWEEN SAID ELECTRODES IN SUFFICIENT QUANTITY TO PRODUCE ARC STARTING IONIZATION OF THE STABLE GASEOUS MEDIUM IN SAID GAP AND THE CONSEQUENT PROMPT INITIATION OF AN ARC ACROSS SAID GAP AND INTERRUPTING SAID SUPPLY OF RADIOACTIVE GAS TO SAID GAP AFTER SAID ARC HAS BEEN INITIATED.
References Cited (Backward Citations)
US2646492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |