Patent US4163004A successfully refreshed from Google Patents.
US4163004A
Expired / Lapsed
US
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Dental filling materials
Assignee: Wallace A Erickson and Co
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Filing: 1977-06-17
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Granted: 1979-07-31
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Expires: 1997-06-17
Abstract
Abstract An improved filler for use with a polymerizable monomer in preparing direct dental filling materials is produced by treating a finely divided inorganic filler with a tetra (alkenyloxy) titanium di(dialkyl) phosphite.
Inventors
- 👤 Wallace A. Erickson
- 👤 Byoung I. Suh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:00
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/08; A; A61; A61K; A61K6/00; A61K6/70; A61K6/71; A61K6/76; A61K6/77; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/20
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
69 words
A process for treating a finely divided inorganic filler for improving its bonding properties to an active polyfunctional polymerizable monomer having at least two acrylic end groups, which method comprises treating said finely divided inorganic filler with a solution of a tetra (alkenyloxy) titanium di (di-alkyl) phosphite having the formula (R.sub.1 O).sub.4 --Ti --[P(OH) (OR.sub.2).sub.2 ].sub.2 wherein R 1 is an organic radical having the formula --A--(XB)n in which
Claim 2
Dependent Claim
69 words
A process for treating a finely divided inorganic filler for improving its bonding properties to an active polyfunctional polymerizable monomer having at least two acrylic end groups, which method comprises treating said finely divided inorganic filler with a solution of a tetra (alkenyloxy) titanium di (di-alkyl) phosphite having the formula (R.sub.1 O).sub.4 --Ti --[P(OH) (OR.sub.2).sub.2 ].sub.2 wherein R 1 is an organic radical having the formula --A--(XB)n in which
Claim 3
Dependent Claim
19 words
A is a straight of branched chain, divalent or trivalent, hydrocarbon radical having 3 to 8 carbon atoms; ##STR4##
Claim 4
Dependent Claim
19 words
A is a straight of branched chain, divalent or trivalent, hydrocarbon radical having 3 to 8 carbon atoms; ##STR4##
Claim 5
Dependent Claim
36 words
B is a straight or branched chain hyrocarbon radical having at least one terminal double bond and 3 to 8 carbon atoms when X is --O--, or 2 to 7 carbon atoms when X is ##STR5##
Claim 6
Dependent Claim
36 words
B is a straight or branched chain hyrocarbon radical having at least one terminal double bond and 3 to 8 carbon atoms when X is --O--, or 2 to 7 carbon atoms when X is ##STR5##
Claim 7
Dependent Claim
6 words
n is 1 or 2; and
Claim 8
Dependent Claim
6 words
n is 1 or 2; and
Claim 9
Dependent Claim
16 words
R 2 is a straight or branched chain alkyl group having 6 to 16 carbon atoms;
Claim 10
Dependent Claim
16 words
R 2 is a straight or branched chain alkyl group having 6 to 16 carbon atoms;
Claim 11
Dependent Claim
4 words
removing excess solution; and
Claim 12
Dependent Claim
4 words
removing excess solution; and
Claim 13
Dependent Claim
38 words
heating said filler at a temperature of about 110°-130° C. for a period sufficient to improve the shelf life of a mixture of said monomer, said filler, and a free radical generating catalyst suitable for polymerizing said monomer.
Claim 14
Dependent Claim
38 words
heating said filler at a temperature of about 110°-130° C. for a period sufficient to improve the shelf life of a mixture of said monomer, said filler, and a free radical generating catalyst suitable for polymerizing said monomer.
Claim 15
Dependent Claim
16 words
The process of claim 1 wherein said heating is carried out for at least 4 hours.
Claim 16
Dependent Claim
15 words
A finely divided inorganic filler material which has been treated in accordance with claim 2.
Claim 17
Dependent Claim
57 words
An activatable paste-like material for use in producing a direct dental filling material comprising a mixture of at least one active, polyfunctional monomer having at least two acrylic end groups, a free radical generating catalyst suitable for polymerizing said monomer, and a finely divided inorganic filler material, and filler having been pretreated in accordance with claim 1.
Claim 18
Dependent Claim
23 words
The material of claim 4 wherein A has 6-8 carbon atoms, B has 4-6 carbon atoms and R 2 has 10-14 carbon atoms.
Claim 19
Dependent Claim
14 words
The material of claim 4 wherein said phosphite is tetra (2,2-di-allyloxymethyl-1-butoxy) titanium di(di-tridecyl) phosphite.
Claim 20
Dependent Claim
14 words
The material of claim 4 wherein said phosphite is tetra (2,2-diallyloxymethyl-1-butoxy) titanium di(di-tridecyl) phosphite.
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) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |