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US Patent 5035886 - Active agent delivery device
US Patent Issued on July 30, 1991
Estimated Patent Expiration Date:
May 10, 2010Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
May 10, 2010Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractAn active agent delivery device comprises (a) microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided water-insoluble filler of which at least about 50 percent by weight is siliceous, and interconnecting pores; and (b) a releasable active agent or precursor thereof associated with at least a portion of the filler.Other References
| InventorsAssigneeApplicationNo. 521626 filed on 05/10/1990US Classes:424/405, Biocides; animal or insect repellents or attractants (e.g., disinfectants, pesticides, etc.)424/84, BAITS, ATTRACTANTS, OR LURES (NON-FOOD)424/401, Cosmetic, antiperspirant, dentifrice424/484, Matrices424/486, Synthetic polymer512/4, Nonliquid or encapsulated514/963, Microcapsule-sustained or differential release521/61, Process of preparing a cellular product by removal of material from a solid polymer-containing matrix without expanding the matrix; composition which is nonexpandible and is designed to form a cellular product by said process; or process of preparing said composition521/62, Mixture of solid polymers present during cell formation521/64Removing a liquid to form a cellular productField of Search512/4, Nonliquid or encapsulated424/401, Cosmetic, antiperspirant, dentifrice424/486, Synthetic polymer424/484, Matrices521/61, Process of preparing a cellular product by removal of material from a solid polymer-containing matrix without expanding the matrix; composition which is nonexpandible and is designed to form a cellular product by said process; or process of preparing said composition521/62, Mixture of solid polymers present during cell formation521/64, Removing a liquid to form a cellular product514/963Microcapsule-sustained or differential releaseExaminersPrimary: Page, Thurman K.Assistant: Phelan, D. Gabrielle Attorney, Agent or FirmUS Patent References2823421, 2825640, 2940830, 2988440, 3351495, 3426754, 3598122, 3598123, 3707807, 3742951, 3844865, 3870593, 3885950, 3920785, 3921636, 3926188, 3985540, Metal complexes of hydroxyquinoline and polymeric porous granulesIssued on: 10/12/1976 Inventor: Fein , et al.4043921, Cellulose ether-polyacrylamide aqueous gels Issued on: 08/23/1977 Inventor: Hessert , et al.4051086, Absorption rate of absorbent polymers by treating with glyoxal Issued on: 09/27/1977 Inventor: Reid4053580, Microsealed pharmaceutical delivery device Issued on: 10/11/1977 Inventor: Chien , et al.4069161, Preparation of aqueous solutions of polyacrylamides Issued on: 01/17/1978 Inventor: Pogers4071508, Anionic hydrogels based on hydroxyalkyl acrylates and methacrylates Issued on: 01/31/1978 Inventor: Steckler4169014, Method of immobilizing proteinaceous substances Issued on: 09/25/1979 Inventor: Goldberg4172066, Cross-linked, water-swellable polymer microgels Issued on: 10/23/1979 Inventor: Zweigle , et al.4194041, Waterproof laminate Issued on: 03/18/1980 Inventor: Gore , et al.4227911, Wetting agent and use thereof in agriculture Issued on: 10/14/1980 Inventor: Leonard , et al.4230105, Transdermal delivery of drugs Issued on: 10/28/1980 Inventor: Harwood4237083, Process of manufacturing a microporous sheet material Issued on: 12/02/1980 Inventor: Young , et al.4289749, Polymeric diffusion matrix containing phenylpropanolamine Issued on: 09/15/1981 Inventor: Keith , et al.4292301, Polymeric diffusion matrix containing ephedrine Issued on: 09/29/1981 Inventor: Keith , et al.4292302, Polymeric diffusion matrix containing terbutaline Issued on: 09/29/1981 Inventor: Keith , et al.4292303, Polymeric diffusion matrix containing clonidine Issued on: 09/29/1981 Inventor: Keith , et al.4293565, Transdermal medication system for isosorbide dinitrate Issued on: 10/06/1981 Inventor: Cordes , et al.4294820, Polymeric diffusion matrix containing phenylephrine Issued on: 10/13/1981 Inventor: Keith , et al.4362737, Transdermal carrier materials Issued on: 12/07/1982 Inventor: Schafer , et al.4411893, Topical medicament preparations Issued on: 10/25/1983 Inventor: Johnson , et al.4443511, Elastomeric waterproof laminate Issued on: 04/17/1984 Inventor: Worden , et al.4501793, Surfactant treated polyolefinic microporous materials capable of multiple re-wetting with aqueous solutions Issued on: 02/26/1985 Inventor: Sarada4525340, Composite body for long-term delivery of effective substances Issued on: 06/25/1985 Inventor: Lange , et al.4539256, Microporous sheet material, method of making and articles made therewith Issued on: 09/03/1985 Inventor: Shipman4613544, Waterproof, moisture-vapor permeable sheet material and method of making the same Issued on: 09/23/1986 Inventor: Burleigh4617359, High molecular weight polyacrylamide synthesis Issued on: 10/14/1986 Inventor: Smith4622356, Polyacrylamide and polyacrylic acid polymers Issued on: 11/11/1986 Inventor: Jarovitzky , et al.4648417, Apparatus for degreasing a continuous sheet of thin material Issued on: 03/10/1987 Inventor: Johnson , et al.4681750, Preparation of amorphous, precipitated silica and siliceous filler-reinforced microporous polymeric separator Issued on: 07/21/1987 Inventor: Johnson , et al.4734229, Method for calendering temperature-critical thermoplastic material using a two-phase heat transfer medium Issued on: 03/29/1988 Inventor: Johnson , et al.4756844, Controlled-release composition having a membrane comprising submicron particles Issued on: 07/12/1988 Inventor: Walles , et al.4791144, Microporous film and process for production thereof Issued on: 12/13/1988 Inventor: Nagou , et al.4833172, Stretched microporous material Issued on: 05/23/1989 Inventor: Schwarz , et al.4957787Artificial flower Issued on: 09/18/1990 Inventor: Reinhardt, et al. Foreign Patent References
International ClassA61K 031/74 |
