US3420718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of very low carbon-containing cold-rolled steel strips
Assignee: Yawata Seitetsu KK
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Filing: 1965-08-20
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Granted: 1969-01-07
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Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 Nobuo Fukuda
- 👤 Mineo Shimizu
- 👤 Kameo Matsukura
- 👤 Narumi Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:40
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/04; C21D8/0447; C21D8/0463; B; B21; B21B; B21B1/00; B21B1/22; B21B45/00; C21D3/00; C21D3/02; C21D3/04; C21D8/0421; C21D8/0436; C21D8/0473
Claims Analysis
Total Claims: 0
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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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |