Patent US3713511A successfully refreshed from Google Patents.
US4412015A
Expired / Lapsed
US
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Dental filler material containing zeolite for dental composite and method of manufacture
Assignee: Individual
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Filing: 1981-05-04
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Granted: 1983-10-25
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Expires: 2001-05-04
Abstract
Abstract The dental filler material is formed from a selection of one or more finely divided inorganic particles of, barium containing glass or zeolite crystals with up to 100% of such particles having a coating thereon of a polymerized acrylate containing monomers or oligomers. The dental composite is formed using the dental filler material and a methacrylate based polymeric resin binder system.
Inventors
- 👤 Stewart J. Lustgarten
- 👤 Jurgen Engelbrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:38
CPC Classifications
C; C08; C08F; C08F292/00; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; C08K; C08K9/00; C08K9/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/2996; Y10T428/2998
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
A polishable dental material composite comprising: a binder resin of unreacted polymerizable acrylate containing monomors or oligomers; a free radical initiating agent for polymerizing said binder and finely divided particles of inorganic filler constituting at least 60% by weight of said composite with said inorganic filler composed primarily of zeolite crystals having a stereo lattice structure with a proportion of said inorganic filler having a coating thereon of a polymerized acrylate containing monomers or oligomers in a ratio of uncoated to coated filler particles between 1:10 and 10:1 by weight.
Claim 2
Dependent Claim
90 words
A polishable dental material composite comprising: a binder resin of unreacted polymerizable acrylate containing monomors or oligomers; a free radical initiating agent for polymerizing said binder and finely divided particles of inorganic filler constituting at least 60% by weight of said composite with said inorganic filler composed primarily of zeolite crystals having a stereo lattice structure with a proportion of said inorganic filler having a coating thereon of a polymerized acrylate containing monomers or oligomers in a ratio of uncoated to coated filler particles between 1:10 and 10:1 by weight.
Claim 3
Dependent Claim
51 words
A dental material composite as defined in claim 1 wherein said coated particles of inorganic filler have a mean diameter within a size range of between 0.1 to 50 microns and with said polymerized coating having a mean thickness ranging between that of a thin film to 35 microns in thickness.
Claim 4
Dependent Claim
24 words
A dental material composite as defined in claim 2 wherein said polymerized coating has a mean thickness of between about 0.01 to 3 microns.
Claim 5
Dependent Claim
25 words
A dental material composite as defined in claims 2 or 3 wherein the coated particles of inorganic filler have a maximum Mohs hardness of 7.
Claim 6
Dependent Claim
31 words
A dental material composite as defined in claim 4 wherein said coating on said particles of inorganic filler comprises a dimethacrylate resin coupled to said particles by a silane keying agent.
Claim 7
Dependent Claim
66 words
A polishable dental filler material comprising finely divided inorganic particles having a mean particle size of between 0.1-50 microns and composed primarily of zeolite crystals containing aluminum and sodium, potassium or calcium with a proportion of said filler particles having a coating thereon of a polymerized acrylate containing monomers or oligomers in a ratio of uncoated to coated filler particles between 1:10 and 10:1 by weight.
Claim 8
Dependent Claim
66 words
A polishable dental filler material comprising finely divided inorganic particles having a mean particle size of between 0.1-50 microns and composed primarily of zeolite crystals containing aluminum and sodium, potassium or calcium with a proportion of said filler particles having a coating thereon of a polymerized acrylate containing monomers or oligomers in a ratio of uncoated to coated filler particles between 1:10 and 10:1 by weight.
Claim 9
Dependent Claim
24 words
A dental filler material as defined in claim 6 wherein said coating has a mean thickness of between about 0.01 to about 3 microns
Claim 10
Dependent Claim
21 words
A dental filler material as defined in claim 7 wherein said coated particles possess a maximum Mohs hardness of about 7.
Claim 11
Dependent Claim
25 words
A dental filler material as defined in claim 8 wherein said coating comprises a dimethacrylate resin coupled to said particles by a silane keying agent.
Claim 12
Dependent Claim
15 words
An inorganic filler material as defined in claim 9 wherein said coating is triethyleneglycol dimethacrylate.
Claim 13
Independent Claim
141 words
A method for preparing a polishable dental composite material for use as a dental restorative comprising the steps of: coating finely divided particles of zeolite crystals in a size range of from about 0.1 to 50 microns with an organosilane keying agent; treating said silanized particles with a solution of an acrylate resin containing monomers or oligomers in a solvent; polymerizing said acrylate resin to form an acrylate coating upon said finely divided particles; fractionating said polymerized coated filler particles into a desired grain size range of between 1-10 microns; combining said polymerized coated zeolite particles with uncoated inorganic filler particles in a ratio of between 1:10 to 10:1; and incorporating said combination of filler particles into a polymeric acrylic resin binder composition containing a free radical initiator in a first container and an aromatic amine accelerator in a second container.
Claim 14
Independent Claim
141 words
A method for preparing a polishable dental composite material for use as a dental restorative comprising the steps of: coating finely divided particles of zeolite crystals in a size range of from about 0.1 to 50 microns with an organosilane keying agent; treating said silanized particles with a solution of an acrylate resin containing monomers or oligomers in a solvent; polymerizing said acrylate resin to form an acrylate coating upon said finely divided particles; fractionating said polymerized coated filler particles into a desired grain size range of between 1-10 microns; combining said polymerized coated zeolite particles with uncoated inorganic filler particles in a ratio of between 1:10 to 10:1; and incorporating said combination of filler particles into a polymeric acrylic resin binder composition containing a free radical initiator in a first container and an aromatic amine accelerator in a second container.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |