Patent US2432996A successfully refreshed from Google Patents.
US2432996A
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Apparatus for punching tuyeres of copper converters and the like
Assignee: Kennecott Corp
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Filing: 1945-10-01
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Granted: 1947-12-23
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Expires: 1965-10-01
Abstract
No abstract record available.
Inventors
- 👤 Larson Leonard
- 👤 Byron T Berge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:26
CPC Classifications
F; F27; F27D; F27D99/00; F27B; F27B7/00; F27B7/20; F27B7/2083; F27D25/00; F27D25/001; F27D25/003; F27B7/22; F27B2007/2246; F27B2007/2253; F27B2007/226; F27B7/36; F27B7/362; F27B2007/367
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) | 1950-12-22 | 1951-06-23 | 1951-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-22 | 1955-06-23 | 1955-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-22 | 1959-06-23 | 1959-12-23 | $7700.00 | Window Closed / Lapsed |