US3375823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental syringe for selectively discharging dry air, water or spray
Assignee: JAMES B PAMPLIN
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Filing: 1964-09-29
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Granted: 1968-04-02
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Expires: 1984-09-29
Abstract
No abstract record available.
Inventors
- 👤 James B Pamplin
- 👤 Richard B Cocherell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:21
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/02; A61C17/0217
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A DENTAL SPRINGE HAVING SELECTIVELY OPERABLE VALVE CONTROLLED AIR AND WATER PASSAGE MEANS AND ADJACENT AIR AND WATER DISCHARGE ORIFICES IN A SPRAY TIP OF THE SYRINGE, THE COMBINATION COMPRISING: A HOUSING WITH SEPARATE AIR AND WATER PASSAGE MEANS THERETHROUGH; A VARIABLE VOLUME CHAMBER WITHIN SAID HOUSING HAVING FLUID COMMUNICATION WITH SAID WATER PASSAGE MEANS DOWNSTREAM OF A VALVE MEANS FOR CONTROLLING AND WATER PASSAGE MEANS; SELECTOR MEANS OPERATIVELY ASSOCIATED WITH SAID WATER VALVE MEANS AND WITH AN AIR VALVE MEANS FOR SAID AIR PASSAGE MEANS TO EFFECT JOINT AND SEPARATE OPERATION OF SAID AIR VALVE AND WATER VALVE; AND MEANS INTERCONNECTED BETWEEN SAID SELECTOR MEANS AND SAID VARIABLE VOLUME CHAMBER TO EFFECT A PREDETERMINED VOLUMETRIC ENLARGEMENT OF SAID VARIABLE VOLUME CHAMBER WHEN SAID SELECTOR MEANS IS POSITIONED TO PERMIT OPENING OF SAID AIR VALVE ONLY, WHEREBY TO DRAW INTO SAID WATER OUTLET ORIFICE ANY WATER DISPOSED IMMEDIATELY OUTSIDE OF SAID WATER ORIFICE ON SAID SPRAY TIP.
Claim 2
Dependent Claim
158 words
IN A DENTAL SPRINGE HAVING SELECTIVELY OPERABLE VALVE CONTROLLED AIR AND WATER PASSAGE MEANS AND ADJACENT AIR AND WATER DISCHARGE ORIFICES IN A SPRAY TIP OF THE SYRINGE, THE COMBINATION COMPRISING: A HOUSING WITH SEPARATE AIR AND WATER PASSAGE MEANS THERETHROUGH; A VARIABLE VOLUME CHAMBER WITHIN SAID HOUSING HAVING FLUID COMMUNICATION WITH SAID WATER PASSAGE MEANS DOWNSTREAM OF A VALVE MEANS FOR CONTROLLING AND WATER PASSAGE MEANS; SELECTOR MEANS OPERATIVELY ASSOCIATED WITH SAID WATER VALVE MEANS AND WITH AN AIR VALVE MEANS FOR SAID AIR PASSAGE MEANS TO EFFECT JOINT AND SEPARATE OPERATION OF SAID AIR VALVE AND WATER VALVE; AND MEANS INTERCONNECTED BETWEEN SAID SELECTOR MEANS AND SAID VARIABLE VOLUME CHAMBER TO EFFECT A PREDETERMINED VOLUMETRIC ENLARGEMENT OF SAID VARIABLE VOLUME CHAMBER WHEN SAID SELECTOR MEANS IS POSITIONED TO PERMIT OPENING OF SAID AIR VALVE ONLY, WHEREBY TO DRAW INTO SAID WATER OUTLET ORIFICE ANY WATER DISPOSED IMMEDIATELY OUTSIDE OF SAID WATER ORIFICE ON SAID SPRAY TIP.
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) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |