Patent US2096539A successfully refreshed from Google Patents.
Patent US3835175A successfully refreshed from Google Patents.
US3835175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
9-fluorenylmethanol haloformates, carbonates and thiocarbonates
Assignee: Research Corp
•
Filing: 1971-03-15
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Granted: 1974-09-10
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Expires: 1991-03-15
Abstract
Abstract The invention disclosed herein is generally concerned with novel 9-fluorenylmethyloxycarbonyl compounds and their reactions. More particularly, it is concerned with these novel compounds and their utility in the preparation of peptides, especially as blocking reagents for protection of free amino or carboxyl groups in amino acids or peptides. The compounds are also useful for separating racemic mixtures into their optical isomers.
Inventors
- 👤 L Carpino
- 👤 G Han
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:10
CPC Classifications
C; C07; C07K; C07K1/00; C07K1/06; C07K1/061; C07K1/062; C07K1/063; C07K1/064; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
10 words
A compound as in claim 1 wherein X is chlorine.
References Cited (Backward Citations)
US2870057A
Cited
US3546165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |