US4937369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analogues of phosphatidylcholine or phosphatidyl ethanol amines
Assignee: Abbott Vascular Devices Ltd
•
Filing: 1989-03-27
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Granted: 1990-06-26
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Expires: 2009-03-27
Abstract
Abstract A compound of formulain which X<sup>1</sup> is a reactive group that can react to form a covalent bond with a reactive group on the surface of a material to be rendered biocompatible, X<sup>2</sup> is a group -O<sup>e</sup> or a precursor of such a group, n is 2, 3 or 4, Y is a group -*NR<sub>3</sub>A<sup>e</sup> wherein each R, which may be the same or different, is a C<sub>1</sub>-C<sub>4</sub> alkyl group and A<sup>e</sup> is an anion present when X<sup>2</sup> is an electrically neutral group or Y iswherein R<sup>1</sup> together with X<sup>2</sup> forms a direct bond between the nitrogen and the phosphorus atoms.
Inventors
- 👤 Dennis Chapman
- 👤 Aziz A. Durrani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:45
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6581; C07F9/6584; C07F9/65842; C07F9/65844; A; A61; A61L; A61L33/00; A61L33/0076; A61L33/0082; C07C; C07C43/00; C07C43/30; C07C43/315; C07F5/00; C07F5/003; C07F9/06; C07F9/08; C07F9/09; C07F9/091
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A compound of formula ##STR25## in which X 1 is halogen, X 2 is group --O.sup.⊖ or a precursor of such a group, n is 2, 3 or 4, Y is a group --N + R 3 A - wherein each R which may be the same or different, is a C 1 -C 4 alkyl group and A - is present when X 2 is an electrically neutral group.
Claim 2
Dependent Claim
70 words
A compound of formula ##STR25## in which X 1 is halogen, X 2 is group --O.sup.⊖ or a precursor of such a group, n is 2, 3 or 4, Y is a group --N + R 3 A - wherein each R which may be the same or different, is a C 1 -C 4 alkyl group and A - is present when X 2 is an electrically neutral group.
Claim 3
Dependent Claim
11 words
A compound according to claim 1 wherein X 1 is chlorine.
Claim 4
Dependent Claim
18 words
A compound according to claim 1 wherein Y is --N.sup.⊕ R 3 A.sup.⊖ and each R is methyl.
Claim 5
Dependent Claim
10 words
A compound according to claim 3 wherein n is 2.
Claim 6
Dependent Claim
3 words
Choline acetate dichlorophosphate.
Claim 7
Dependent Claim
3 words
Choline acetate dichlorophosphate.
References Cited (Backward Citations)
US3197431A
Cited
US3202633A
Cited
US3492193A
Cited
US4006176A
Cited
US4206156A
Cited
US4239709A
Cited
US4609646A
Cited
US4471131A
Cited
US4640790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |