Patent US2525274A successfully refreshed from Google Patents.
US2525274A
Expired / Lapsed
US
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Electric preheater for hair waving
Assignee: DUART MANUFACTURING Co Ltd
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Filing: 1948-06-28
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Granted: 1950-10-10
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Expires: 1968-06-28
Abstract
No abstract record available.
Inventors
- 👤 Floyd V Schleimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:01
CPC Classifications
A; A45; A45D; A45D4/00; A45D4/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1680718A
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US1972186A
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US2108964A
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US2165552A
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US2161202A
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US2133573A
Cited
GB526813A
Cited
US2455839A
Cited
US2491939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |