Patent US3556669A successfully refreshed from Google Patents.
US3556669A
Expired / Lapsed
US
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Fluid control system for dental instruments
Assignee: Sybron Transition Corp
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Filing: 1969-02-10
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Granted: 1971-01-19
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Expires: 1989-02-10
Abstract
Abstract A CONTROL SYSTEM FOR A PLURALITY OF AIR DRIVEN DENTAL TOOLS INCLUDING ADJUSTABLE AIR PRESSURE VALVE MEANS FOR INDEPENDENTLY VARYING THE AIR PRESSURE SUPPLIED TO EACH TOOL AND ALSO INCLUDING ADJUSTABLE OIL CONTROL VALVE MEANS FOR INDEPENDENTLY VARYING THE QUANTITY OF OIL SUPPLIED TO EACH TOOL REQUIRING OILED AIR WHEREBY ANY TOOL CAN BE REPLACED BY A DIFFERENT TOOL HAVING DIFFERENT AIR PRESSURE AND OIL SUPPLY REQUIREMENTS BY SIMPLY MAKING SUITABLE ADJUSTMENTS IN THE RESPECTIVE VALVE MEANS.
Inventors
- 👤 John J Valeska
- 👤 Donald N Spencer
- 👤 Edson L Kummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:02
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |