US3138873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum attachment for dental aspirator unit
Assignee: Individual
•
Filing: 1961-09-08
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Granted: 1964-06-30
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Expires: 1981-09-08
Abstract
No abstract record available.
Inventors
- 👤 Harold P Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:16
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/06; A61C17/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A VACUUM ATTACHMENT FOR A DENTAL ASPIRATOR UNIT, COMPRISING A HOUSING HAVING A CHAMBER THEREIN, A INLET MEANS AND AIR OUTLET MEANS FOR SAID CHAMBER, A CONDUIT ATTACHED TO SAID AIR INLET MEANS FOR CONNECTING TO A DENTAL ASPIRATOR UNIT, A MOTOR-DIVEN SUCTION FAN, SAID OUTLET MEANS INCLUDING AN INPERFORATE TUBE PROVIDING COMMUNICATION BETWEEN SAID CHAMBER AND THE AIR INTAKE SIDE OF SAID AUCTION FAN, SAID CHAMBER BEING ADAPTED TO RECEIVE AND COLLECT LIQUIDS AND SOLID DEBRIS DRAWN THROUGH SAID CONDUIT, LIQUID OUTLET MEANS FOR SAID CHAMBER, A TRAP VALVE IN SAID LIQUID OUTLET MEANS, SAID TRAP VALVE BEING NORMALLY CLOSED BY THE SUCTION IN SAID CHAMBER, A FLOAT IN SAID CHAMBER AND VALVE MEANS OPERATED BY SAID FLOAT FOR CLOSING THE INLET END OF THE AIR OUTLET TUBE WHEN LIQUID IN THE CHAMBER REACHES A PREDETERMINED LEVEL.
Claim 2
Dependent Claim
138 words
A VACUUM ATTACHMENT FOR A DENTAL ASPIRATOR UNIT, COMPRISING A HOUSING HAVING A CHAMBER THEREIN, A INLET MEANS AND AIR OUTLET MEANS FOR SAID CHAMBER, A CONDUIT ATTACHED TO SAID AIR INLET MEANS FOR CONNECTING TO A DENTAL ASPIRATOR UNIT, A MOTOR-DIVEN SUCTION FAN, SAID OUTLET MEANS INCLUDING AN INPERFORATE TUBE PROVIDING COMMUNICATION BETWEEN SAID CHAMBER AND THE AIR INTAKE SIDE OF SAID AUCTION FAN, SAID CHAMBER BEING ADAPTED TO RECEIVE AND COLLECT LIQUIDS AND SOLID DEBRIS DRAWN THROUGH SAID CONDUIT, LIQUID OUTLET MEANS FOR SAID CHAMBER, A TRAP VALVE IN SAID LIQUID OUTLET MEANS, SAID TRAP VALVE BEING NORMALLY CLOSED BY THE SUCTION IN SAID CHAMBER, A FLOAT IN SAID CHAMBER AND VALVE MEANS OPERATED BY SAID FLOAT FOR CLOSING THE INLET END OF THE AIR OUTLET TUBE WHEN LIQUID IN THE CHAMBER REACHES A PREDETERMINED LEVEL.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |