US4866132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel radiopaque barium polymer complexes, compositions of matter and articles prepared therefrom
Assignee: Research Foundation of the State University of New York
•
Filing: 1986-04-17
•
Granted: 1989-09-12
•
Expires: 2006-04-17
Abstract
Abstract Radiopaque polymeric materials comprising halogenated barium salts, homogeneously distributed at the molecular level, provide permanent, nonleachable radiopacities at least equivalent to pure aluminum without adversely affecting mechanical or physical properties of compositions in which they are employed.
Inventors
- 👤 Alan Obligin
- 👤 Du W. Xia
- 👤 Ruth Silberman-Hazony
- 👤 H. Ralph Rawls
- 👤 Israel Cabasso
- 👤 Johannes Smid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
A homogeneous, optically transparent radiopaque polymer comprising barium ions of a hydrated barium salt molecularly bound to a polymer comprising repeating macromer units selected from the group consisting of: ##STR5## wherein R 1 is acrylate, methacrylate, ethacrylate or styrene; R 2 is hydrogen or lower alkyl; R 3 is lower alkyl; z is from 0 to 3; n is 2 or 3, x is an integer of at least 8; y is an integer of at least 6 and for each barium ion present there are at least 10 alkylene oxide units present for polymers containing I or III and at least 6 ethylene oxide units present for polymers containing II, said barium being virtually nonleachable from the polymer.
Claim 2
Dependent Claim
119 words
A homogeneous, optically transparent radiopaque polymer comprising barium ions of a hydrated barium salt molecularly bound to a polymer comprising repeating macromer units selected from the group consisting of: ##STR5## wherein R 1 is acrylate, methacrylate, ethacrylate or styrene; R 2 is hydrogen or lower alkyl; R 3 is lower alkyl; z is from 0 to 3; n is 2 or 3, x is an integer of at least 8; y is an integer of at least 6 and for each barium ion present there are at least 10 alkylene oxide units present for polymers containing I or III and at least 6 ethylene oxide units present for polymers containing II, said barium being virtually nonleachable from the polymer.
Claim 3
Dependent Claim
69 words
The radiopaque polymer of claim 1 wherein the barium ions of the hydrated barium salt are complexed with a polymer comprising repeating macromer units of the formula: ##STR6## wherein R 1 is selected from acrylate, methacrylate or ethacrylate; R 2 is hydrogen, methyl or ethyl; x is an integer ranging from 8 to about 50 and for each barium ion present there are at least 10 ethylene oxide units.
Claim 4
Dependent Claim
55 words
The radiopaque polymer of claim 2 wherein the barium ions of the hydrated barium salt are complexed with a polymer comprising repeating macromer units of the formula: is methacrylate, R 2 is methyl; x is an integer of at least 8 and for each barium ion present there are at least 10 ethylene oxide units.
Claim 5
Dependent Claim
59 words
The radiopaque polymer of claim 1 wherein the barium ions of the hydrated barium salt are complexed with a polymer comprising repeating macromer units of the formula: ##STR7## in which R 2 is hydrogen or lower alkyl; x is an integer of at least 8 and for each barium ion present there are at least 10 ethylene oxide units.
Claim 6
Dependent Claim
61 words
The radiopaque polymer of claim 4 wherein the barium ions of the hydrated barium salt are complexed with a polymer comprising mixture of repeating macromers of the formulas: ##STR8## in which R 2 is hydrogen, methyl or ethyl and x is an integer of at least 8 and for each barium ion present there are at least 10 ethylene oxide units.
Claim 7
Dependent Claim
69 words
The radiopaque polymer of claim 1 wherein the barium ions of the hydrated barium salt are complexed with a polymer comprising repeating macromer units of the formula: ##STR9## in which R 2 is hydrogen, methyl or ethyl; R 3 is methyl or ethyl, z is 2 and x is an integer of at least 8, and for each barium ion present there are at least 10 ethylene oxide units.
Claim 8
Dependent Claim
63 words
The radiopaque polymer of claim 1 wherein the barium ions of the hydrated barium salt are complexed with a polymer comprising repeating macromer units of the formula: ##STR10## in which R 2 is hydrogen, methyl or ethyl; R 3 is methyl; x is an integer of at least 8, and for each barium ion present there are at least 1 ethylene oxide units.
Claim 9
Dependent Claim
25 words
The radiopaque polymer of claim 1 wherein the barium ions are derived from salts selected from monohydrates and dihydrates of barium bromide an barium iodide.
Claim 10
Dependent Claim
52 words
The radiopaque polymer of claim 1 wherein the barium ions of the hydrated barium salt are complexed with a polymer comprising repeating macromer units of the formula: ##STR11## wherein y is an integer of at least 6 and for each barium ion present there are at least 6 ethylene oxide units present.
Claim 11
Dependent Claim
22 words
The radiopaque polymer of claim 1 including a comonomer selected from styrene, acrylonitrile or an alpha, beta ethylenically unsaturated acid o ester.
Claim 12
Dependent Claim
22 words
The radiopaque polymer of claim 3 including a comonomer selected from styrene, acrylonitrile or an alpha, beta ethylenically unsaturated acid or ester.
Claim 13
Dependent Claim
12 words
A biomedical resin containing composition comprising a radiopaque polymer of claim 1.
Claim 14
Dependent Claim
12 words
A biomedical resin containing composition comprising the radiopaque polymer of claim 3.
Claim 15
Dependent Claim
12 words
A biomedical resin containing composition comprising the radiopaque polymer of claim 4.
Claim 16
Dependent Claim
12 words
A biomedical resin containing composition comprising the radiopaque polymer of claim 6.
Claim 17
Dependent Claim
12 words
A biomedical resin containing composition comprising the radiopaque polymer of claim 9.
Claim 18
Dependent Claim
12 words
A biomedical resin containing composition comprising the radiopaque polymer of claim 10.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |