Patent US3471928A successfully refreshed from Google Patents.
US3471928A
Expired / Lapsed
US
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Foot controller for dental drills
Assignee: Sybron Transition Corp
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Filing: 1966-01-13
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Granted: 1969-10-14
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Expires: 1986-01-13
Abstract
No abstract record available.
Inventors
- 👤 Arthur Gilbert Billin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:02
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/0007; A61C1/0015; A61C1/0023; H; H01; H01H; H01H3/00; H01H3/02; H01H3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |