US3722833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of spatulating packaged dental filling
Assignee: Japan Kinoko Research Center Foundation
•
Filing: 1970-11-12
•
Granted: 1973-03-27
•
Expires: 1990-11-12
Abstract
Abstract Pre-packaged dental filling ingredients for use by dentists. The ingredients which are in part liquid and in part powder are encapsulated and sealed tightly in a flexible-membrane formed bag and therein separated one from the other which separation is released by the compression of the bag to cause the ingredients to be successively brought into contact and mixed together. The mixture, confined within the bag, is spatulated to form a paste or semi-solid, ready for application to a patient''s tooth. The spatulation may be carried out advantageously with apparatus adapted to compressively roll over the flexible bag supported on a surface or squeeze the bag against the surface.
Inventors
- 👤 K Inoue
- 👤 A Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:13
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/32; B65D81/3261; A; A61; A61C; A61C5/00; A61C5/60; A61C5/68; B01; B01F; B01F31/00; B01F31/55; B65B; B65B29/00; B65B29/10; Y; Y10; Y10S; Y10S366/00; Y10S366/602
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
A method of preparing a dental filling in paste form from a plurality of starting materials including a liquid and a powder, comprising the steps of: encapsulating within a flexible-membrane-formed bag premeasured quantities of said liquid and said powder with one separated from the other therein, providing a compressive motion onto said bag by squeezing it between a flat surface and a convex surface at a pressure and of character sufficient to release said separation, thereby causing said liquid and powder to be successively brought into contact and mixed together to form a paste within the confined space of said bag, the zone of compression shifting progressively over the bag to cause the paste to be spatulated within said bag, and applying an oscillatory magnetic field to said bag and the mixture therein as said bag is being squeezed, said magnetic field inducing an electric current of microampere order to pass through said mixture.
Claim 2
Independent Claim
154 words
A method of preparing a dental filling in paste form from a plurality of starting materials including a liquid and a powder, comprising the steps of: encapsulating within a flexible-membrane-formed bag premeasured quantities of said liquid and said powder with one separated from the other therein, providing a compressive motion onto said bag by squeezing it between a flat surface and a convex surface at a pressure and of character sufficient to release said separation, thereby causing said liquid and powder to be successively brought into contact and mixed together to form a paste within the confined space of said bag, the zone of compression shifting progressively over the bag to cause the paste to be spatulated within said bag, and applying an oscillatory magnetic field to said bag and the mixture therein as said bag is being squeezed, said magnetic field inducing an electric current of microampere order to pass through said mixture.
Claim 3
Independent Claim
129 words
A method of preparing a dental filling in paste form from a plurality of starting materials including a liquid and a powder, comprising the step of: encapsulating within a flexible-membrane-formed bag premeasured quantities of said liquid and said powder, providing a separation barrier between them, exerting a squeezing force on the bag to rupture the separation barrier and to mix the liquid and powder together to form a paste within the confined space of the bag, while shifting the force progressively over the bag to cause the paste to be spatulated within said bag, and applying an oscillatory magnetic field to said bag and the mixture therein while said squeezing force is being exerted, said magnetic field inducing an electric current of microampere order to pass through said mixture.
Claim 4
Independent Claim
129 words
A method of preparing a dental filling in paste form from a plurality of starting materials including a liquid and a powder, comprising the step of: encapsulating within a flexible-membrane-formed bag premeasured quantities of said liquid and said powder, providing a separation barrier between them, exerting a squeezing force on the bag to rupture the separation barrier and to mix the liquid and powder together to form a paste within the confined space of the bag, while shifting the force progressively over the bag to cause the paste to be spatulated within said bag, and applying an oscillatory magnetic field to said bag and the mixture therein while said squeezing force is being exerted, said magnetic field inducing an electric current of microampere order to pass through said mixture.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |