US3459209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slag retaining device for use during tapping of converters
Assignee: Vodafone GmbH
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Filing: 1967-08-30
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Granted: 1969-08-05
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Expires: 1987-08-30
Abstract
No abstract record available.
Inventors
- 👤 Helmut Kobusch
- 👤 Johannes Gruner
- 👤 Arnold Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:43
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4653; F; F27; F27D; F27D3/00; F27D3/15; F27D3/1509; F27D3/1536; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3006; Y10T137/7287; Y10T137/7313; Y10T137/7323; Y10T137/7326; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436
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) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |