Patent US2708928A successfully refreshed from Google Patents.
US3605745A
Expired / Lapsed
US
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Dental injection apparatus
Assignee: Individual
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Filing: 1969-12-15
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Granted: 1971-09-20
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Expires: 1989-12-15
Abstract
Abstract APPARATUS FOR SLOWLY AND UNIFORMLY INJECTING LIQUID ANESTHESIA AND THE LIKE COMPRISING A SYRINGE HAVING A COMPRESSIBLE CARTRIDGE THEREIN CONTAINING THE ANESTHESIA, AND PISTON AND CYLINDER MEANS FOR EFFECTING COMPRESSION OF THE CARTRIDGE TO CAUSE THE DESIRED DISPENSING OF THE ANESTHESIA SAID APPARATUS COMPRISING A SUPPLY OF A VISCOUS FLUID, SUCH AS HYDRAULIC OIL, WHICH IS FORCED INTO SAID CYLINDER THROUGH A PORT LOCATED ON ONE SIDE OF THE PISTON AND IS FORCED OUT OF THE CYLINDER THROUGH A PORT LOCATED ON THE OPPOSITE SIDE OF THE PISTON, WHEREUPON MOVEMENT OF THE PISTON IS CUSHIONED BY THE VISCOUS FLUID.
Inventors
- 👤 Milton Hodosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:35
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/20; A61M5/14; A61M5/142; A61M5/145; A61M2005/14513; A61M2005/2086; A61M2205/00; A61M2205/33; A61M2205/3331; A61M2205/3334; A61M5/1452; A61M5/14526
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |