US4768951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental tray
Assignee: GC Corp
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Filing: 1987-07-16
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Granted: 1988-09-06
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Expires: 2007-07-16
Abstract
Abstract A dental tray of a shape suitable for direct contact with the mucosal surface of the mouth and capable of retaining an impression making material thereon comprising a thermoplastic resin material transparent to activating light energy radiation and which is softenable at a temperature ranging from 40°-70° C.
Inventors
- 👤 Masao Abiru
- 👤 Bunsaku Yoshida
- 👤 Shiro Kono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:37
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/0006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
48 words
A dental tray of a shape suitable for direct contact with the mucosal surface of the mouth and capable of retaining an impression making material thereon, comprising: a thermoplastic resin material transparent to activating light energy radiation and which is softenable at a temperature ranging from 40°-70° C.
Claim 2
Dependent Claim
48 words
A dental tray of a shape suitable for direct contact with the mucosal surface of the mouth and capable of retaining an impression making material thereon, comprising: a thermoplastic resin material transparent to activating light energy radiation and which is softenable at a temperature ranging from 40°-70° C.
Claim 3
Dependent Claim
54 words
The dental tray of claim 1, wherein said thermoplastic resin material is polystyrene, a polystyrene derivative, poly(meth)acrylate, a poly(meth)acrylate derivative, polytetrafluoroethylene, a derivative of polytetrafluoroethylene, polyvinylfluoride, a derivative of polyvinylfluoride, polychlorotrifluoroethylene, a derivative of polychlorotrifluoroethylene, polybutadiene, a derivative of polybutadiene, polyisoprene, a derivative of polyisoprene, polyurethane, a derivative of polyurethane or an ethylene copolymers.
Claim 4
Dependent Claim
173 words
The dental tray of claim 1, wherein said thermoplastic resin material is an ionomer resin of an ethylene copolymer selected from the group consisting of ethylene/acrylic acid copolymers, ethylene/methacrylic acid copolymers, ethylene/itaconic acid copolymers, ethylene/methyl maleate copolymers, ethylene/maleic acid copolymers, ethylene/acrylic acid/methyl methacrylate copolymers, ethylene/methacrylic acid/ethyl acrylate copolymers, ethylene/itaconic acid/methyl methacrylate copolymers, ethylene/methyl maleate/ethyl acrylate copolymers, ethylene/methacrylic acid/vinyl acetate copolymers, ethylene/acrylic acid/vinyl alcohol copolymers, ethylene/propylene/acrylic acid copolymers, ethylene/styrene/acrylic acid copolymers, ethylene/methacrylic acid/acrylonitrile copolymers, ethylene/fumaric acid/vinyl methyl ether copolymers, ethylene/vinyl chloride/acrylic acid copolymers, ethylene/vinylidene chloride/acrylic acid copolymers, ethylene/vinyl fluoride/methacrylic acid copolymers, ethylene/chlorotrifluoroethylene/methacrylic acid copolymers, wherein the metal ion reacted with said copolymer to form said ionomer resin is a metal selected from the group consisting of Na + , K + , Li + , Cs + , Ag + , Cu + , Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ , Cu 2+ , Sn 2+ , Fe 2+ , Ni 2+ , Zn 2+ , Al 3+ , Sc 3+ , Fe 3+ , or Yt 3+ .
Claim 5
Dependent Claim
36 words
The dental tray of claim 1, wherein the thermoplastic resin material of said tray contains a filler in an amount up to less than 70 wt. % based on the total weight of the dental tray.
Claim 6
Dependent Claim
35 words
The dental tray of claim 4, wherein said filler is calcium carbonate, titanium dioxide, zirconium silicate, aluminum silicate, silica, a MMA polymer, a polyvinylchloride powder, alumina, glass, kaolin, anhydrous silicic acid or hydrous silicic acid.
References Cited (Backward Citations)
US4161065A
Cited
US4553936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |