US2967768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for desulphurising pig. and cast-iron melts
Assignee: Dortmund Hoerder Huettenunion AG
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Filing: 1959-05-06
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Granted: 1961-01-10
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Expires: 1979-05-06
Abstract
No abstract record available.
Inventors
- 👤 Harders Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:51
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/02; C21C7/00; C21C7/10
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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |