Patent US4269764A successfully refreshed from Google Patents.
US4269764A
Expired / Lapsed
US
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Preparation for treatment of allergic patients sensitive to ragweed pollen
Assignee: Abbott Laboratories
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Filing: 1980-06-27
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Granted: 1981-05-26
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Expires: 2000-06-27
Abstract
Abstract The preparation of this invention comprises ragweed antigens polymerized with glutaraldehyde which are composed essentially of water-soluble polymers of molecular weights from 200,000 to 20,000,000.
Inventors
- 👤 Roy Patterson
- 👤 Floyd C. McIntire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:01
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/35; A61K39/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
A mixture of polymers of ragweed antigen E, said polymer mixture being the product of the reaction of antigen E with glutaraldehyde, all of the polymers of said mixture being water soluble and comprising polymers of molecular weights both above and below 200,000.
Claim 2
Dependent Claim
43 words
A mixture of polymers of ragweed antigen E, said polymer mixture being the product of the reaction of antigen E with glutaraldehyde, all of the polymers of said mixture being water soluble and comprising polymers of molecular weights both above and below 200,000.
Claim 3
Dependent Claim
58 words
The process of preparing a preparation for treatment of patients sensitive to pollen, comprising reacting ragweed antigen with glutaraldehyde to form a water soluble polymer mixture containing polymers both above and below 200,000 molecular weight, and fractionating said polymer mixture to obtain a preparation of molecular weight above 200,000 substantially free of polymers of molecular weight below 200,000.
Claim 4
Dependent Claim
58 words
The process of preparing a preparation for treatment of patients sensitive to pollen, comprising reacting ragweed antigen with glutaraldehyde to form a water soluble polymer mixture containing polymers both above and below 200,000 molecular weight, and fractionating said polymer mixture to obtain a preparation of molecular weight above 200,000 substantially free of polymers of molecular weight below 200,000.
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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |