US5019601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric composition containing therapeutic agents and articles manufactured therefrom
Assignee: 3M Purification Inc
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Filing: 1989-08-18
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Granted: 1991-05-28
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Expires: 2009-08-18
Abstract
Abstract A novel elastomeric composition of matter comprises a rubber latex and a masterbatch comprising a therapeutic agent in a therapeutically effective amount, a carrier component, titanium dioxide, and clay. A process for the preparation of a novel elastomeric composition of matter containing a therapeutic agent includes the steps of preparaing a masterbatch containing a therapeutic agent, adding the masterbatch to a rubber latex and thereafter forming and curing a desired product therefrom. The composition is useful in the manufacture of rubber goods such as surgical and medical products which can be single or multilayered.
Inventors
- 👤 Dwight L. Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K9/00; C08K9/12; C08J2321/00; C08J2483/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
Medical and surgical instruments formed from a stable elastomeric composition comprising: a rubber latex selected from the group consisting of natural rubber, synthetic rubber and mixtures thereof; and from about 7.5 to 30 parts by weight, based upon the weight of 100 parts of said rubber, of a masterbatch comprising, a therapeutically effective amount of a therapeutic agent; at least about 3 parts by weight, per 100 based upon the weight of said rubber, of a carrier component selected from the group consisting of polysiloxane emulsions; from about 5 to 20 parts by weight of clay, based upon the weight of said rubber; and from about 5 to 15 parts by weight of titanium dioxide, based upon the weight of said rubber.
Claim 2
Dependent Claim
122 words
Medical and surgical instruments formed from a stable elastomeric composition comprising: a rubber latex selected from the group consisting of natural rubber, synthetic rubber and mixtures thereof; and from about 7.5 to 30 parts by weight, based upon the weight of 100 parts of said rubber, of a masterbatch comprising, a therapeutically effective amount of a therapeutic agent; at least about 3 parts by weight, per 100 based upon the weight of said rubber, of a carrier component selected from the group consisting of polysiloxane emulsions; from about 5 to 20 parts by weight of clay, based upon the weight of said rubber; and from about 5 to 15 parts by weight of titanium dioxide, based upon the weight of said rubber.
Claim 3
Dependent Claim
32 words
Medical and surgical instruments, as set forth in claim 1, wherein said therapeutic agent is selected from the group consisting of antibiotics, anti-inflammatory agents, anti-puretic agents, anti-fungal agents, analgesic agents and spermicides.
Claim 4
Dependent Claim
17 words
Medical and surgical instruments, as set forth in claim 2, wherein said therapeutic agent is an antibiotic.
Claim 5
Dependent Claim
32 words
Medical and surgical instruments, as set forth in claim 3, wherein said therapeutically effective amount of said antibiotic is from about 0.5 to 2.5 parts by weight, per 100 parts of rubber.
Claim 6
Dependent Claim
15 words
Medical and surgical instruments, as set forth in claim 4, wherein said antibiotic is Neomycin.
Claim 7
Dependent Claim
17 words
Medical and surgical instruments, as set forth in claim 1, wherein said rubber latex is natural rubber.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |