US3932938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment package for dental filling materials
Assignee: Individual
•
Filing: 1972-12-11
•
Granted: 1976-01-20
•
Expires: 1992-12-11
Abstract
Abstract A pad of sheets each containing a plurality of discrete, premeasured quantities of pigments for producing natural colors in composite plastic dental filling materials, said pigments being adhered to said sheets by a hardened vehicle in which said pigments are dispersed, and said pigments in said vehicle being directly dispersible in said filling materials when brought into contact therewith.
Inventors
- 👤 Leo Mackta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:29
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/08; A61C13/082; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
A sheet containing a plurality of discrete, premeasured quantities of pigments for producing natural colors in composite plastic dental filling materials, said pigments being adhered to said sheet by a hardened vehicle in which said pigments are dispersed, and said pigments in said vehicle being directly dispersible in said filling materials when brought into contact therewith.
Claim 2
Dependent Claim
56 words
A sheet containing a plurality of discrete, premeasured quantities of pigments for producing natural colors in composite plastic dental filling materials, said pigments being adhered to said sheet by a hardened vehicle in which said pigments are dispersed, and said pigments in said vehicle being directly dispersible in said filling materials when brought into contact therewith.
Claim 3
Dependent Claim
30 words
A sheet according to claim 1 having a plurality of pigments disposed thereon in separate spaced apart rows, each row containing a separate pigment in segmented portions in columnar arrangement.
Claim 4
Dependent Claim
22 words
A sheet according to claim 2 in which there are four rows respectively containing pigments of yellow, brown, blue and opaque white.
Claim 5
Dependent Claim
21 words
A sheet according to claim 2 in which said portions are wedge-shaped and each portion contains about 0.05 grams of material.
Claim 6
Dependent Claim
22 words
A sheet according to claim 2 in which said segmented portions are rectangular and contain up to about 0.05 grams of material.
Claim 7
Dependent Claim
27 words
A sheet according to claim 2 in which said portions are distributed as a series of dots and contain about 0.05 grams of material for each color.
Claim 8
Dependent Claim
78 words
A sheet according to claim 3 in which said yellow pigment contains iron oxide ochre; said brown pigment contains about one part by weight iron oxide ochre, about two parts by weight red oxide and about 0.4 parts by weight black oxide; said blue pigment contains about two parts by weight black oxide and 0.2 parts by weight blue dye; and said opaque white pigment contains titanium dioxide; and said vehicle is comprised of a methylmethacrylate polymer composition.
Claim 9
Dependent Claim
99 words
A method of coloring a plastic dental filling material using a sheet according to claim 1 to provide a natural color matching the tooth to be filled, said material of the type formulated from two components comprising a base material and a catalyst, said method comprising the steps of contacting a preselected number and quantities of said pigments with one of said components and mixing the same to produce a preselected color therein, then adding the other of said components to the mixture and thoroughly mixing said components and pigments to produce a filling material of the desired color.
Claim 10
Dependent Claim
12 words
A pad containing a plurality of severable sheets according to claim 1.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |