Patent US4264764A successfully refreshed from Google Patents.
US4264764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Meningitis vaccine
Assignee: Merck and Co Inc
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Filing: 1979-09-24
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Granted: 1981-04-28
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Expires: 1999-09-24
Abstract
Abstract A high molecular weight capsular polysaccharide from H. influenza type b is an effective immunogenic agent against infection caused by the H. influenza type b bacterium.
Inventors
- 👤 Peter J. Kniskern
- 👤 Arpi Hagopian
- 👤 Dennis J. Carlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:54
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/02; A61K39/102; Y; Y10; Y10S; Y10S424/00; Y10S424/831
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
An antigenic and immunogenic capsular polysaccharide from H. influenza type b consisting of about equal parts of ribose, ribitol and phosphate, substantially all of the polysaccharide having a molecular weight of at least about 5,000,000, and about half of the polysaccharide having a molecular weight of at least about 10,000,000.
Claim 2
Dependent Claim
50 words
An antigenic and immunogenic capsular polysaccharide from H. influenza type b consisting of about equal parts of ribose, ribitol and phosphate, substantially all of the polysaccharide having a molecular weight of at least about 5,000,000, and about half of the polysaccharide having a molecular weight of at least about 10,000,000.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |