US3281572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc welding equipment
Assignee: Panasonic Holdings Corp
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Filing: 1965-02-01
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Granted: 1966-10-25
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Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Oku Takeshi
- 👤 Shibano Takashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:26
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/124; B23K9/125; B23K9/06; B23K9/067; B23K9/0671
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
AN ARC WELDING DEVICE FOR OPERATION WITH A CONSUMABLE ELECTRODE COMPRISING WELDING POWER SUPPLY MEANS OPERATIVE TO PROVIDE IN THE INITIAL STAGE OF WELDING AT THE TIME OF STRIKING AN ARC A WELDING CURRENT WITH A RISE RATE DI/DT (MEAN VALUE IN 10 MILLISECONDS AFTER INITIATION OF SHORT CIRCUIT) OF MORE THAN 50X103 AMPERES PER SECOND AND TO SUPPLY A SHORT CIRCUIT CURRENT WITH A PEAK VALUE IS OF MORE THAN 1000 AMPERES, SAID WELDING POWER SUPPLY MEANS BEING RESTORED TO ITS NORMAL STEADY OPERATIVE STATE WITH A TIME LAG T1 OF LESS THAN 120X10-3 SECONDS AND A RISE RATE DI/DT (MEAN VALUE IN 10 MILLISECONDS AFTER INITIATION OF SHORT CIRCUIT) OF THE WELDING CURRENT OF LESS THAN 30X103 AMPERES PER SECOND AFTER
Claim 2
Dependent Claim
123 words
AN ARC WELDING DEVICE FOR OPERATION WITH A CONSUMABLE ELECTRODE COMPRISING WELDING POWER SUPPLY MEANS OPERATIVE TO PROVIDE IN THE INITIAL STAGE OF WELDING AT THE TIME OF STRIKING AN ARC A WELDING CURRENT WITH A RISE RATE DI/DT (MEAN VALUE IN 10 MILLISECONDS AFTER INITIATION OF SHORT CIRCUIT) OF MORE THAN 50X103 AMPERES PER SECOND AND TO SUPPLY A SHORT CIRCUIT CURRENT WITH A PEAK VALUE IS OF MORE THAN 1000 AMPERES, SAID WELDING POWER SUPPLY MEANS BEING RESTORED TO ITS NORMAL STEADY OPERATIVE STATE WITH A TIME LAG T1 OF LESS THAN 120X10-3 SECONDS AND A RISE RATE DI/DT (MEAN VALUE IN 10 MILLISECONDS AFTER INITIATION OF SHORT CIRCUIT) OF THE WELDING CURRENT OF LESS THAN 30X103 AMPERES PER SECOND AFTER
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |