Patent US2905798A successfully refreshed from Google Patents.
US2905798A
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Induction heating apparatus
Assignee: Lindberg Engineering Co
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Filing: 1958-09-15
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Granted: 1959-09-22
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Expires: 1978-09-15
Abstract
No abstract record available.
Inventors
- 👤 Freutel Kenneth Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/16; C30B13/20; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1076; Y10T117/1084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2202758A
Cited
US2461283A
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US2749423A
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GB710426A
Cited
US2845377A
Cited
US2743199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |