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Patent US2549944A successfully refreshed from Google Patents.
US2549944A
Expired / Lapsed
US
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Electrical heating device
Assignee: Individual
•
Filing: 1948-06-19
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Granted: 1951-04-24
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Expires: 1968-06-19
Abstract
No abstract record available.
Inventors
- 👤 Leonard E Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:55
CPC Classifications
H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US795803A
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US1240584A
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GB130172A
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US1406360A
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US1498684A
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GB397021A
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US2029075A
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US2367369A
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US2419655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |