Patent US4714768A successfully refreshed from Google Patents.
US4714768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(chlorocarbonyloxy)-5-norbornene-2,3-dicarboximide, process for its production and its use
Assignee: Berlin-Brandenburg Academy of Sciences and Humanities
•
Filing: 1984-08-27
•
Granted: 1987-12-22
•
Expires: 2004-08-27
Abstract
Abstract A new compound is disclosed, N-(chlorocarbonyloxy-5-norbornene-2,3-dicarboximide I, in addition to processes for its production and employment of the compound as starting product for the manufacture of non-symmetrical carbonate, urethane-protected amino acid or peptide, activated carrier and carrier-ligand-complexes. The new compound is reacted with alcohols as well as with hydroxyl-group-containing or amino-group-containing polymers.
Inventors
- 👤 Peter Henklein
- 👤 Manfred Becker
- 👤 Werner Buttner
- 👤 Fritz Loth
- 👤 Horts Dautzenberg
- 👤 Klaus Forner
- 👤 Rudolf Dolling
- 👤 Karl-Heinz Graul
- 👤 Wolf-Rainer Halatsch
- 👤 Christian Rupprich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:13
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/58; C07D209/72; C07D209/76; C12; C12N; C12N11/00; C12N11/02; C12N11/06; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/54353; G01N33/544
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
N-(chlorocarbonyloxy)-5-norbornene-2,3-dicarboximide I.
Claim 2
Dependent Claim
2 words
N-(chlorocarbonyloxy)-5-norbornene-2,3-dicarboximide I.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |