US3427150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing iron or steel with low sulphur content
Assignee: NIEHAUS ENG SA
•
Filing: 1966-08-09
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Granted: 1969-02-11
•
Expires: 1986-08-09
Abstract
No abstract record available.
Inventors
- 👤 Conrad F Niehaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:48
CPC Classifications
F; F27; F27D; F27D27/00; C; C21; C21C; C21C1/00; C21C1/02; C21C5/00; C21C5/28; C21C5/30; C21C5/32; F27B; F27B19/00; F27B19/04; F27B1/00; F27B14/00; F27B14/08; F27B14/10; F27B2014/102; F27B3/00; F27B3/06; F27B3/065; F27D17/00; F27D17/30; F27D3/00; F27D2003/0034; F27D2003/0038; F27D3/12; F27D2003/125; F27D2003/127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3172756A
Cited
US2902358A
Cited
US3136626A
Cited
US3259486A
Cited
US3326672A
Cited
US3334993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |