Claims
- 1. A composition for effecting the controlled release of an active agent to an environment, comprising a tubule containing a solution or dispersion of an active agent in a carrier in the lumen thereof, wherein said tubule has an inner diameter of from 0.1 to 1 μm and a lenath of 1 μm to 1 mm.
- 2. The composition of claim 1, wherein said tubule is coated with metal.
- 3. The composition of claim 2, wherein said carrier is a polymer.
- 4. The composition of claim 1, wherein said active agent is one or more members selected from the group consisting of fungicides, herbicides, insecticides, pheromones, hormones, antibiotics, antihelmetics, and antifouling agents.
- 5. The composition of claim 1, wherein said tubule further comprises an additional amount of said active agent within the wall of the tubule or on the outside surface of the tubule.
- 6. The composition of claim 2, wherein said metal is copper.
- 7. The composition of claim 1, wherein said carrier is polyvinylchloride.
- 8. The composition of claim 1, wherein said carrier is a polysaccharide.
- 9. The composition of claim 1, wherein said carrier is a water soluble epoxy resin.
- 10. The composition of claim 1, wherein said active agent is tetracycline.
- 11. The composition of claim 1, wherein said active agent is tetracycline and said carrier is polyvinyl chloride.
- 12. The composition of claim 1, wherein said tubules consist of polymerizable diacetylenic phospholipid molecules.
- 13. A composition for effecting the controlled release of an active agent to an environment, comprising a tubule containing a solution or dispersion of an active agent in a carrier in the lumen thereof, wherein said tubule has an inner diameter of from 0.1 to 1 μm, and a length of 1 μm to 1 mm, and said active agent is selected from the group consisting of fungicides, herbicides, insecticides, pheromones, hormones, antibiotics, antihelmetics, antifoulants, and mixtures thereof and wherein said carrier is a polymer selected from the group consisting of polysaccharides, polyesters, polyamides, polypeptides, polyurethanes, polyethylenes, polypropylenes, polyvinylchlorides, polystyrenes, polyphenols, polyvinyl pyrrolidone, polyvinyl alcohol, polyvinyl formal resin, water soluble epoxy resins, urea-formaldehyde, polyvinyl acetate and mixtures thereof, and wherein said composition provides a zero order or first order release rate of said active agent from said tubule to said environment.
- 14. The composition as claimed in claim 13, wherein said active agent is selected from the group consisting of hormones, antibiotics and antihelmetics and wherein said carrier is a polysaccharide.
Parent Case Info
This is a division, of application Ser. No. 08/077,503, filed on Jun. 17, 1993 now U.S. Pat. No. 5,492,696, which was a continuation of application Ser. No. 07/668,772, filed on Mar. 11, 1991, now abandoned, which was a continuation-in-part of application Ser. No. 07/343,762, filed on Apr. 14, 1989, now U.S. Pat. No. 5,049,382.
US Referenced Citations (8)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0168862 |
Jan 1986 |
EP |
1190969 |
May 1970 |
GB |
Non-Patent Literature Citations (1)
Entry |
Insect Suppression with Controlled Release Phenomona Systems Kydonieus et al.ed. CRC Press 1982 pp 200-204. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
07/668772 |
Mar 1991 |
US |
Child |
08/077503 |
|
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
07/343762 |
Apr 1989 |
US |
Child |
07/668772 |
|
US |