US3961379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bioimplantable device from crosslinked, swollen, hydrophilic polymers
Assignee: Individual
•
Filing: 1974-07-17
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Granted: 1976-06-08
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Expires: 1994-07-17
Abstract
Abstract A method for modifying the properties of solid polymers in which a polymerizable substance is introduced into the polymer to be modified and is then polymerized. The method allows solid polymers having desirable combinations of properties not otherwise obtainable to be made and permits accurate control over the properties. The method also permits the making of solid polymer articles having different properties in different parts of their bulk and is especially valuable in making hydrophilic polymers of well controlled properties.
Inventors
- 👤 Donald J. Highgate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:38
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; A; A61; A61L; A61L27/00; A61L27/14; A61L27/16; A61L27/50; A61L27/52; C08J7/02; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; Y; Y10; Y10S; Y10S525/00; Y10S525/937
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
A process for modifying properties of a swellable cross-linked solid polymer of at least one monomer selected from the group consisting of alkyl acrylates, alkyl methacrylates, hydroxy alkyl acrylates, hydroxy alkyl methacrylates and acrylamide comprising the steps of swelling an article of said cross-linked polymer in a mixture, in which said polymer is swellable, of at least one monomer selected from the group consisting of alkyl acrylates, alkyl methacrylates and N-vinyl-2-pyrrolidone and a cross-linking agent selected from the group consisting of allyl methacrylate and ethylene glycol dimethacrylate for the selected monomer and polymerising said mixture in the swollen polymer.
Claim 2
Dependent Claim
99 words
A process for modifying properties of a swellable cross-linked solid polymer of at least one monomer selected from the group consisting of alkyl acrylates, alkyl methacrylates, hydroxy alkyl acrylates, hydroxy alkyl methacrylates and acrylamide comprising the steps of swelling an article of said cross-linked polymer in a mixture, in which said polymer is swellable, of at least one monomer selected from the group consisting of alkyl acrylates, alkyl methacrylates and N-vinyl-2-pyrrolidone and a cross-linking agent selected from the group consisting of allyl methacrylate and ethylene glycol dimethacrylate for the selected monomer and polymerising said mixture in the swollen polymer.
Claim 3
Dependent Claim
19 words
A process according to claim 1 in which the polymerisation is effected by subjecting the swollen polymer to irradiation.
Claim 4
Dependent Claim
124 words
A process for modifying properties of a swellable cross-linked solid polymer of at least one monomer selected from the group consisting of alkyl acrylates, alkyl methacrylates, hydroxy alkyl acrylates, hydroxy alkyl methacrylates and acrylamide comprising the steps of swelling an article of said cross-linked polymer in a substance in which said polymer is swellable and which is miscible with alkyl acrylates, alkyl methacrylates and N-vinyl-2-pyrrolidone and mixtures thereof, exchanging said substance at least partially by a polymerisable mixture comprising at least one monomer selected from the group consisting of alkyl acrylates, alkyl methacrylates and N-vinyl-2-pyrrolidone and a cross-linking agent selected from the group consisting of allyl methacrylate and ethylene glycol dimethacrylate for the selected monomer and polymerising said polymerisable mixture in the swollen polymer.
Claim 5
Dependent Claim
124 words
A process for modifying properties of a swellable cross-linked solid polymer of at least one monomer selected from the group consisting of alkyl acrylates, alkyl methacrylates, hydroxy alkyl acrylates, hydroxy alkyl methacrylates and acrylamide comprising the steps of swelling an article of said cross-linked polymer in a substance in which said polymer is swellable and which is miscible with alkyl acrylates, alkyl methacrylates and N-vinyl-2-pyrrolidone and mixtures thereof, exchanging said substance at least partially by a polymerisable mixture comprising at least one monomer selected from the group consisting of alkyl acrylates, alkyl methacrylates and N-vinyl-2-pyrrolidone and a cross-linking agent selected from the group consisting of allyl methacrylate and ethylene glycol dimethacrylate for the selected monomer and polymerising said polymerisable mixture in the swollen polymer.
Claim 6
Dependent Claim
27 words
A process according to claim 3 in which the solid polymer is initially swollen in a substance selected from the group consisting of alcohols, aldehydes and ketones.
Claim 7
Dependent Claim
14 words
A process according to claim 3 in which the polymerisation is effected by irradiation.
Claim 8
Dependent Claim
16 words
A bioimplantable device formed of a hydrophilic solid polymer made by the process of claim 1.
Claim 9
Dependent Claim
16 words
A bioimplantable device formed of a hydrophilic solid polymer made by the process of claim 3.
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |