US2848566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating apparatus for fusing vitreous enamel
Assignee: AO Smith Corp
•
Filing: 1954-02-01
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Granted: 1958-08-19
•
Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Limpel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:54
CPC Classifications
C; C23; C23D; C23D5/00; C23D5/005; C23D9/00; C23D9/06; H; H05; H05B; H05B6/00; H05B6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
APPARATUS FOR FIRING A VITREOUS ENAMEL TO A STEEL ARTICLE, COMPRISING AN INDUCTION HEATING ELEMENT, MEANS TO ENERGIZE SAID ELEMENT AND INDUCE A CURRENT IN SAID ARTICLE TO HEAT THE SAME TO A TEMPERATURE SUFFICIENT TO FUSE THE VITREOUS ENAMEL COATING TO THE STEEL ARTICLE, MEANS FOR REFLECTING THE HEAT RADIATED FROM THE ARTICLE BACK TOWARD THE ARTICLE, SAID METAL BEING SELECTED FROM
Claim 2
Dependent Claim
63 words
APPARATUS FOR FIRING A VITREOUS ENAMEL TO A STEEL ARTICLE, COMPRISING AN INDUCTION HEATING ELEMENT, MEANS TO ENERGIZE SAID ELEMENT AND INDUCE A CURRENT IN SAID ARTICLE TO HEAT THE SAME TO A TEMPERATURE SUFFICIENT TO FUSE THE VITREOUS ENAMEL COATING TO THE STEEL ARTICLE, MEANS FOR REFLECTING THE HEAT RADIATED FROM THE ARTICLE BACK TOWARD THE ARTICLE, SAID METAL BEING SELECTED FROM
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |