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Patent US2671268A successfully refreshed from Google Patents.
US2671268A
Expired / Lapsed
US
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Foot control for dental engines
Assignee: Individual
•
Filing: 1949-07-30
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Granted: 1954-03-09
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Expires: 1969-07-30
Abstract
No abstract record available.
Inventors
- 👤 Howard E Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:29
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/0007; A61C1/0015; A61C1/0023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US508692A
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USRE18416E
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US1538952A
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US1729616A
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US1878602A
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US2425985A
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US2560873A
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US2466355A
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US2491748A
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US2544491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |