US3364334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for arc welding
Assignee: Hitachi Ltd
•
Filing: 1966-10-19
•
Granted: 1968-01-16
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Expires: 1986-10-19
Abstract
No abstract record available.
Inventors
- 👤 Sato Hiroshi
- 👤 Fujiwara Hiroyuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:20
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/10; B23K9/1006; B23K9/1043; B23K9/1068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2777973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |