US3645996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resins useful in peptide synthesis
Assignee: Eli Lilly and Co
•
Filing: 1969-03-10
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Granted: 1972-02-29
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Expires: 1989-03-10
Abstract
Abstract A BENZYL STYRENE-DIVINYLBENZENE COPLYMER USEFUL AS AN ESTER-FORMING C-PROTECTING GROUP IN SOLID-PHASE PEPTIDE SYNTHESIS; USJED IN CONJUNCTION WITH EASILY HYDROLYZED NPROTECTING GROUPS, PREFERABLY THE ENAMINE DERIVATIVE PREPARED FROM B-DICARBONYL COMPOUNDS; THE BENZYL STYRENEDIVINYLBENZENE COPOLYMER BEING READILY REMOVABLE, AFTER PEPTIDE FORMATION WITH DILUTE ACIDS IN NON-AQUEOUS SOLVENTS AT ROOM TEMPERATURE.
Inventors
- 👤 George Lee Southard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:02
CPC Classifications
C; C07; C07K; C07K1/00; C07K1/04; C07K1/042; C08; C08F; C08F8/00
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |