US3969303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining material for acrylic dentures and method of preparing the same
Assignee: NEOLOY/DENTEX Inc
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Filing: 1974-08-28
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Granted: 1976-07-13
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Expires: 1994-08-28
Abstract
Abstract The present invention provides a lining material for a polymerized methylmethacrylate denture restoration which consists essentially of an admixture of approximately 40% of methylmethacrylate polymer, approximately 10% of methylmethacrylate monomer, and approximately 50% of butyl phthalyl butyl glycolate. The denture liner material is semi-cured for approximately 5 minutes at a temperature of about 160°F. into a soft, tacky material having no inherent rigidity and which can be manually shaped to conform to an irregular object. The denture liner material can also be semi-cured for approximately 15 minutes at a temperature of 160°F. into a somewhat hard material which is capable of being softened by application of heat and pressure. Both the soft semi-cured liner material and the somewhat hard semi-cured liner material are capable of being finally cured with a polymerized methylmethacrylate denture and adhered thereto to provide a soft liner therefor. The invention also provides methods for preparing the liner material and for adhering it to a polymerized methylmethacrylate denture.
Inventors
- 👤 Emil M. Prosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/12; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10S; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A liner material for polymerized methylmethacrylate denture restorations consisting essentially of an admixture of approximately 40% of finely powdered methylmethacrylate polymer, approximately 10% of methylmethacrylate monomer, and approximately 50% of butyl phthalyl butyl glycolate, which has been semi-cured for approximately 15 minutes at a temperature of about 160°F. into a somewhat hard material, capable of being softened by application of heat and pressure and finally cured at approximately 212°F. with a denture to adhere thereto and to provide a soft liner therefor.
Claim 2
Dependent Claim
82 words
A liner material for polymerized methylmethacrylate denture restorations consisting essentially of an admixture of approximately 40% of finely powdered methylmethacrylate polymer, approximately 10% of methylmethacrylate monomer, and approximately 50% of butyl phthalyl butyl glycolate, which has been semi-cured for approximately 15 minutes at a temperature of about 160°F. into a somewhat hard material, capable of being softened by application of heat and pressure and finally cured at approximately 212°F. with a denture to adhere thereto and to provide a soft liner therefor.
Claim 3
Independent Claim
113 words
The method of preparing a liner material for polymerized methylmethacrylate denture restorations comprising the steps of: a. admixing approximately 40% by weight of methylmethacrylate polymer, 10% by weight of methylmethacrylate monomer and approximately 50% by weight of butyl phthalyl butyl glycolate, b. permitting said mixture to stand without heating for approximately 24 hours until the same is thoroughly plasticized, c. heating the mixture at a temperature of approximately 160°F. for about 5 minutes and at the same time actively stirring the same until it attains homogeneous polymerization, whereby the material is semi-cured into a soft, tacky material having no inherent rigidity, which is capable of being manually shaped to conform to irregular objects.
Claim 4
Independent Claim
113 words
The method of preparing a liner material for polymerized methylmethacrylate denture restorations comprising the steps of: a. admixing approximately 40% by weight of methylmethacrylate polymer, 10% by weight of methylmethacrylate monomer and approximately 50% by weight of butyl phthalyl butyl glycolate, b. permitting said mixture to stand without heating for approximately 24 hours until the same is thoroughly plasticized, c. heating the mixture at a temperature of approximately 160°F. for about 5 minutes and at the same time actively stirring the same until it attains homogeneous polymerization, whereby the material is semi-cured into a soft, tacky material having no inherent rigidity, which is capable of being manually shaped to conform to irregular objects.
Claim 5
Independent Claim
107 words
The method of preparing a liner material for polymerized methylmethacrylate denture restorations comprising the steps of: a. admixing approximately 40% by weight of methylmethacrylate polymer, 10% by weight of methylmethacrylate monomer and approximately 50% by weight of butyl phthalyl butyl glycolate, b. permitting said mixture to stand without heating for approximately 24 hours until the same is thoroughly plasticized, c. heating the mixture at a temperature of approximately 160°F. for about 15 minutes and at the same time actively stirring the same until it attains homogeneous polymerization, whereby the material is semi-cured into a somewhat hard, tacky material having inherent rigidity, for later application to a denture.
Claim 6
Independent Claim
107 words
The method of preparing a liner material for polymerized methylmethacrylate denture restorations comprising the steps of: a. admixing approximately 40% by weight of methylmethacrylate polymer, 10% by weight of methylmethacrylate monomer and approximately 50% by weight of butyl phthalyl butyl glycolate, b. permitting said mixture to stand without heating for approximately 24 hours until the same is thoroughly plasticized, c. heating the mixture at a temperature of approximately 160°F. for about 15 minutes and at the same time actively stirring the same until it attains homogeneous polymerization, whereby the material is semi-cured into a somewhat hard, tacky material having inherent rigidity, for later application to a denture.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |