Patent US3298680A successfully refreshed from Google Patents.
US3298680A
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Vacuum degassing apparatus
Assignee: Bethlehem Steel Corp
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Filing: 1964-06-02
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Granted: 1967-01-17
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Expires: 1984-06-02
Abstract
No abstract record available.
Inventors
- 👤 Jablin Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:39
CPC Classifications
F; F16; F16L; F16L51/00; F16L51/02; F16L51/025; F16L51/027; F27; F27B; F27B5/00; F27B5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2640317A
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US2604339A
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US2840394A
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US2955850A
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US3195873A
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US3152206A
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US3149959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |