US3759890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imidazolyl derivatives of proteins and polysaccharides
Assignee: F Hoffmann La Roche AG
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Filing: 1971-08-31
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Granted: 1973-09-18
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Expires: 1991-08-31
Abstract
Abstract IMIDAZOLYL DERIVATIVES OF POLYPEPTIDES, PROTEINS, AMINOCONTAINING POLYSACCHARIDES AND POLYMERS CONTAINING AT LEAST ONE PRIMARY ALIPHATIC AMINO GROUP ARE DESCRIBED, THESE DERIVATIVES ARE CONVERTED INTO CORRESPONDING DIAZONIUM COMPOUNDS WHICH ARE EMPLOYED IN COUPLING REACTIONS TO PRODUCE PRODUCTS USEFUL IN IMMUNOCHEMISTRY.
Inventors
- 👤 D Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/531; C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/90; C07K; C07K1/00; C07K1/006; C08; C08B; C08B37/00; Y; Y10; Y10S; Y10S436/00; Y10S436/815; Y10S436/817; Y10S436/826; Y10S436/903; Y10S530/00; Y10S530/806
Claims Analysis
Total Claims: 0
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |