Patent US3978328A successfully refreshed from Google Patents.
US5635545A
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US
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Semi-thermoplastic molding composition having heat-stable custom shape memory
Assignee: 3M Co
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Filing: 1995-02-13
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Granted: 1997-06-03
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Expires: 2015-02-13
Abstract
Abstract Thermoplastic molding compositions are made from a mixture of thermoplastic material (for example, polycaprolactone), a free-radically polymerizable resin (for example, a urethane diacrylate oligomer), and free-radical initiator (for example, a visible-light cure photoinitiator). The mixture is solid at 38 DEG C., has a melting or softening point that comfortably can be withstood by oral tissues, and can be imprinted with a heat-stable custom shape memory and semi-thermoplastic properties by shaping the composition to a desired shape and then causing or permitting the resin to undergo polymerization.
Inventors
- 👤 Joel D. Oxman
- 👤 Lani S. Kangas
- 👤 F. Andrew Ubel, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:14
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/0006; A61C13/00; A61C13/08; A61C13/087; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/891; A61K6/893; A61K6/90; C; C08; C08L; C08L67/00; C08L67/02; C08L67/025; C08L67/04; A61C2201/00; A61C2201/007; Y; Y10; Y10S; Y10S522/00; Y10S522/908; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
59 words
A dental crown or bridge, said crown or bridge being formed from a composition comprising a thermoplastic, free radically polymerizable material and a free-radical initiator, the composition being solid at 38° C. and having a melting or softening point at a temperature less than 75° C., the composition having semi-thermoplasticity and hot custom memory after the material is polymerized.
Claim 2
Dependent Claim
59 words
A dental crown or bridge, said crown or bridge being formed from a composition comprising a thermoplastic, free radically polymerizable material and a free-radical initiator, the composition being solid at 38° C. and having a melting or softening point at a temperature less than 75° C., the composition having semi-thermoplasticity and hot custom memory after the material is polymerized.
Claim 3
Dependent Claim
23 words
A dental crown or bridge according to claim 1, wherein the composition has a melting or softening temperature less than about 65° C.
Claim 4
Dependent Claim
15 words
A dental crown or bridge according to claim 1, wherein the material has been polymerized.
Claim 5
Dependent Claim
15 words
A dental crown or bridge according to claim 1, wherein the composition has been photopolymerized.
Claim 6
Dependent Claim
32 words
A dental crown or bridge according to claim 1, wherein the composition will maintain its shape at an elevated temperature sufficient to melt or soften the composition before the material was photopolymerized.
Claim 7
Dependent Claim
17 words
A dental crown or bridge according to claim 1, wherein the composition comprises an acrylate or methacrylate.
Claim 8
Dependent Claim
16 words
A dental crown or bridge according to claim 1, wherein the composition comprises an unsaturated amide.
Claim 9
Dependent Claim
19 words
A dental crown or bridge according to claim 1, wherein the composition comprises an acrylated urethane oligomer or polymer.
Claim 10
Dependent Claim
19 words
A dental crown or bridge according to claim 1, wherein the material comprises an acrylated polyester oligomer or polymer.
Claim 11
Dependent Claim
15 words
A dental crown or bridge according to claim 1, wherein the initiator comprises a photoinitiator.
Claim 12
Independent Claim
109 words
A method for making a crown or bridge, comprising the steps of: a) heating a molding composition to a molten or softened state, said composition comprising a thermoplastic, free-radically polymerizable material, and a free-radical initiator, the composition being solid at 38° C. and having a melting or softening point that comfortably can be withstood by oral tissues, b) shaping said molten or softened molding composition to the form of a crown or bridge, and in either order, c) cooling the composition so that it solidifies and d) causing or permitting the free-radically polymerizable material to undergo polymerization, whereby a semi-thermoplastic crown or bridge having hot custom memory is obtained.
Claim 13
Independent Claim
109 words
A method for making a crown or bridge, comprising the steps of: a) heating a molding composition to a molten or softened state, said composition comprising a thermoplastic, free-radically polymerizable material, and a free-radical initiator, the composition being solid at 38° C. and having a melting or softening point that comfortably can be withstood by oral tissues, b) shaping said molten or softened molding composition to the form of a crown or bridge, and in either order, c) cooling the composition so that it solidifies and d) causing or permitting the free-radically polymerizable material to undergo polymerization, whereby a semi-thermoplastic crown or bridge having hot custom memory is obtained.
Claim 14
Dependent Claim
9 words
The product made by the process of claim 11.
References Cited (Backward Citations)
US2985961A
Cited
US3382202A
Cited
US3427161A
Cited
US3759807A
Cited
GB1304112A
Cited
FR2078675A5
Cited
US3647498A
Cited
US3767627A
Cited
US4071424A
Cited
US4071424B1
Cited
US3756827A
Cited
US4059715A
Cited
US4445854A
Cited
US4182829A
Cited
US4227877A
Cited
US4240415A
Cited
US4327013A
Cited
US4361528A
Cited
US4330283A
Cited
US4491453A
Cited
US4433958A
Cited
US4912174A
Cited
WO1983002898A1
Cited
EP0096020A1
Cited
US4483333A
Cited
US4569342A
Cited
US4552906A
Cited
EP0150952A2
Cited
EP0173085A2
Cited
US4659786A
Cited
US4642126A
Cited
US4787850A
Cited
US4740245A
Cited
US4952614A
Cited
US4761136A
Cited
US4678435A
Cited
US4768951A
Cited
JPS63270759A
Cited
US4859742A
Cited
JPS63171554A
Cited
US4776792A
Cited
DE3810907A1
Cited
US4867680A
Cited
US4828583A
Cited
US4835203A
Cited
US5011407A
Cited
WO1990014052A1
Cited
US5028667A
Cited
US5028667B1
Cited
US5066231A
Cited
US5403188A
Cited
WO1994007429A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |