US3538732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing channel steels
Assignee: Nippon Steel Corp
•
Filing: 1967-06-15
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Granted: 1970-11-10
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Expires: 1987-06-15
Abstract
No abstract record available.
Inventors
- 👤 Ikuya Noda
- 👤 Akira Yamamoto
- 👤 Takashi Ueta
- 👤 Hisao Minami
- 👤 Ryo Hirano
- 👤 Ken Ishiguro
- 👤 Shinichiro Inoue
- 👤 Fujio Someno
- 👤 Sadao Hokari
- 👤 Goro Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:35
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/08; B21B1/095; B21B1/0815; B21B1/09; B21B2001/081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US252460A
Cited
US1785986A
Cited
US1812247A
Cited
US1812248A
Cited
US3165948A
Cited
US3251213A
Cited
US3335596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |