US4704164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic liquid binder composition for porcelain powders
Assignee: ADA Forsyth Institute Inc
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Filing: 1986-11-19
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Granted: 1987-11-03
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Expires: 2006-11-19
Abstract
Abstract An organic liquid composition for use with a heat sinterable porcelain powder, such as dental porcelain powder, which binder composition comprises a mixture of organic liquids which have an index of refraction of the porcelain powder to be mixed with the organic liquid binder.
Inventors
- 👤 Benjamin H. Amdur
- 👤 Edwin J. Riley
- 👤 Ralph B. Sozio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:06
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/70; A61K6/78; A61K6/15; A61K6/16; A61K6/80; A61K6/802
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
64 words
An organic liquid binder composition adapted for use with heat sinterable porcelain powder, which binder composition allows visualization of the true post-sintered color of the porcelain powder prior to sintering and which liquid binder composition has an index of refraction of about 1.40 to 1.60 and comprises in combination a solution of: (a) benzyl-tert-butanol, (b) cycloheptanol; and (c) an alkyl ester of succinic acid.
Claim 2
Dependent Claim
64 words
An organic liquid binder composition adapted for use with heat sinterable porcelain powder, which binder composition allows visualization of the true post-sintered color of the porcelain powder prior to sintering and which liquid binder composition has an index of refraction of about 1.40 to 1.60 and comprises in combination a solution of: (a) benzyl-tert-butanol, (b) cycloheptanol; and (c) an alkyl ester of succinic acid.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein the ester of succinic acid comprises the di-ethyl ester.
Claim 4
Dependent Claim
16 words
The composition of claim 1 which has an index of refraction of about 1.49 to 1.56.
Claim 5
Dependent Claim
9 words
The composition of claim 2 which includes benzyl ether.
Claim 6
Dependent Claim
42 words
The composition of claim 2 wherein the benzyl-tert-butanol comprises about 56.7% by volume, the cycloheptanol comprises about 2.8% by volume, and the succinic acid di-ethyl ester comprises about 40.5% by volume, and the composition has an index of refraction of about 1.470.
Claim 7
Dependent Claim
49 words
The composition of claim 4 wherein the benzyl-tert-butanol comprises about 85.7% by volume, the cycloheptanol comprises about 4.3% by volume, the succinic acid di-ethyl ester comprises about 3.8% by volume and the benzyl ether about 6.2% by volume, and the composition has an index of refraction of about 1.506.
Claim 8
Dependent Claim
42 words
The composition of claim 2 wherein the benzyl-tert-butanol comprises about 45.4% by volume, the cycloheptanol comprises about 2.2% by volume, and the succinic acid di-ethyl ester comprises about 52.4% by volume, and the composition has an index of refraction of about 1.460.
Claim 9
Dependent Claim
16 words
The composition of claim 1 wherein the benzyl-tert-butanol ranges from about 35% to 95% by volume.
Claim 10
Dependent Claim
16 words
The composition of claim 1 wherein the cycloheptanol ranges from about 1% to 8% by volume.
Claim 11
Dependent Claim
20 words
The composition of claim 1 wherein the alkyl ester of succinic acid ranges from about 1% to 70% by volume.
Claim 12
Dependent Claim
17 words
The composition of claim 4 wherein the benzyl ether ranges from about 1% to 20% by volume.
Claim 13
Dependent Claim
17 words
The composition of claim 1 which includes a heat sinterable porcelain powder admixed with the binder composition.
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) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |