US5298569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic ester acrylic compositions capable of releasing bioactive substance at a controlled rate
Assignee: Nippon Paint Co Ltd
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Filing: 1993-01-07
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Granted: 1994-03-29
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Expires: 2013-01-07
Abstract
Abstract A bioactive substance control-releasing resinous composition comprising a resin having main chain and side chains, at least one side chain bearing at the end portion thereof an organic acid moiety having a biological activity, through a metal ester bonding. The resin is hydrolyzed in an ionic atmosphere at a controlled rate to generate a bioactive substance as well as metal ions and is useful in various fields and especially as a resinous vehicle for a coating composition.
Inventors
- 👤 Naoki Yamamori
- 👤 Hiroharu Ohsugi
- 👤 Yoshio Eguchi
- 👤 Junji Yokoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/08; A01N25/10; A61; A61K; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58; C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A bioactive substance control-releasing resinous composition comprising an acrylic resin having both main chain and side chains, at least one side chain bearing at the end portion thereof, at least one group represented by the formula: ##STR11## wherein: X is ##STR12## M is Al, Cu, Ti or Zn; p is 1 m is an integer of 1 to 3 R 2 is a residue of organic acid having a biological activity which is connected through ##STR13## to the metal M and the metal content of the resin being 0.9 to 21.0% by weight of the total weight of the resin.
Claim 2
Dependent Claim
100 words
A bioactive substance control-releasing resinous composition comprising an acrylic resin having both main chain and side chains, at least one side chain bearing at the end portion thereof, at least one group represented by the formula: ##STR11## wherein: X is ##STR12## M is Al, Cu, Ti or Zn; p is 1 m is an integer of 1 to 3 R 2 is a residue of organic acid having a biological activity which is connected through ##STR13## to the metal M and the metal content of the resin being 0.9 to 21.0% by weight of the total weight of the resin.
Claim 3
Dependent Claim
11 words
The bioactive substance according to claim 1 wherein M is Al.
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) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |