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Patent US2492549A successfully refreshed from Google Patents.
US2492549A
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Electrical control device
Assignee: Weber Dental Manufacturing Co
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Filing: 1946-08-30
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Granted: 1949-12-27
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Expires: 1966-08-30
Abstract
No abstract record available.
Inventors
- 👤 Jean C Barnes
- 👤 Ira B Penniman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:18
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US447291A
Cited
US730379A
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US1660161A
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US1660969A
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US1655036A
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US2010577A
Cited
US2100715A
Cited
US2280305A
Cited
US2312117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |