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US3573253A
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Preparation of cross-linked poly (4-hydroxy - 3 - nitro) (nonsubstituted or alpha and/or beta substituted) stryene
Assignee: DON N GRAY
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Filing: 1968-11-18
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Granted: 1971-03-30
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Expires: 1988-11-18
Abstract
Abstract THERE IS DISCLOSED A PROCESS FOR PREPARING A SOLID PHASE, POLYMERIC SUBSTRATE COMPRISING A CROSS-LINKED POLY (4HYDROXY-3-NITRO) STYRENE WHICH IS ESPECIALLY SUITABLE FOR THE SYNTHESIS OF POLYPEPTIDES. THE POLYSTYRENE MAY BE NONSUBSTITUTED OR SUBSTITUTED (ALPHA AND/OR BETA).
Inventors
- 👤 Don N Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:38
CPC Classifications
C; C08; C08F; C08F2/00; C07; C07K; C07K1/00; C07K1/04; C07K1/042; C08F8/00; C08F8/30; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |