US5035884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylene pyrrolidone copolymers for contact lens and pharmaceutical preparations
Assignee: Warner Lambert Co LLC
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Filing: 1990-02-15
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Granted: 1991-07-30
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Expires: 2010-02-15
Abstract
Abstract A new series of copolymers which are useful as coatings for solid dosage forms, for transdermal devices, for wound dressing materials, and for contact lenses. Also disclosed are methods for preparing monomers and polymers as well as pharmaceutical compositions containing such polymers.
Inventors
- 👤 Suk-Zu Song
- 👤 Surendra C. Mehta
- 👤 Kuchi S. Murthy
- 👤 Russell U. Nesbitt
- 👤 Mahdi B. Fawzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:07
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/70; A61K9/7023; A61K9/703; A61K9/7038; A61K9/7046; A61K9/7053; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/284; A61K9/2846; A61K9/7061; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/38; C08; C08F; C08F26/00; C08F26/06; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
32 words
A method of using a copolymer of N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature in a transdermal delivery system for administration of a pharmaceutical.
Claim 2
Independent Claim
32 words
A method of using a copolymer of N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature in a transdermal delivery system for administration of a pharmaceutical.
Claim 3
Independent Claim
32 words
A method of using a copolymer of N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature for sustained release dosage forms for administration of a pharmaceutical.
Claim 4
Independent Claim
32 words
A method of using a copolymer of N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature for sustained release dosage forms for administration of a pharmaceutical.
Claim 5
Independent Claim
27 words
A method of using a copolymer of N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature in a soft contact lens.
Claim 6
Independent Claim
27 words
A method of using a copolymer of N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature in a soft contact lens.
Claim 7
Independent Claim
26 words
A method of using a copolymer of N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature as a wound dressing.
Claim 8
Independent Claim
26 words
A method of using a copolymer of N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature as a wound dressing.
Claim 9
Dependent Claim
28 words
A sustained release pharmaceutical composition comprising a pharmaceutical in combination with a copolymer N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature.
Claim 10
Dependent Claim
28 words
A sustained release pharmaceutical composition comprising a pharmaceutical in combination with a copolymer N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature.
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) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |