US3534388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma jet cutting process
Assignee: Hitachi Ltd
•
Filing: 1969-03-10
•
Granted: 1970-10-13
•
Expires: 1989-03-10
Abstract
No abstract record available.
Inventors
- 👤 Takakiyo Ito
- 👤 Takayuki Kashima
- 👤 Osamu Akiyama
- 👤 Minoru Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:41
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; B; B23; B23K; B23K10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1775532A
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US2008846A
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US1963729A
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US2919341A
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US2963570A
Cited
US2900485A
Cited
US2906858A
Cited
US3082314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |