US3563812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for gas cutting while using shield gas
Assignee: Tanaka Manufacturing Co Ltd
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Filing: 1968-04-03
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Granted: 1971-02-16
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Expires: 1988-04-03
Abstract
Abstract A METHOD FOR GAS CUTTING METAL UTILIZING A MAIN STREAM OF OXYGEN FOR THE CUTTING AND AN OXZYGEN CURTAIN SURROUNDING SAID MAIN STREAM TO MAINTAIN THE PURITY OF SAID MAIN STREAM WHEREIN CUT QUALITY IS DEPENDENT UPON THE CURTAIN OXYGEN MOMENTUM AND THE HEAD PRESSURE OF THE MAIN STREAM OF OXYGEN.
Inventors
- 👤 Minoru Nakanishi
- 👤 Hidehiko Hayasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:33
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/38; F23D14/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |