US3284070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot blast stove having one common combustion chamber
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1964-01-28
•
Granted: 1966-11-08
•
Expires: 1984-01-28
Abstract
No abstract record available.
Inventors
- 👤 Nishida Saichi
- 👤 Imaida Takaynki
- 👤 Uchiyama Haruki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:36
CPC Classifications
F; F28; F28D; F28D17/00; F28D17/04; C; C21; C21B; C21B9/00; Y; Y10; Y10T; Y10T137/00; Y10T137/5544; Y10T137/5617
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US927930A
Cited
US2175611A
Cited
US2163149A
Cited
US2505861A
Cited
US3153532A
Cited
US3150865A
Cited
US3122359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |