US3787392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of nucleoside diphosphate esters
Assignee: Roche Diagnostics GmbH
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Filing: 1971-11-26
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Granted: 1974-01-22
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Expires: 1991-11-26
Abstract
Abstract NUCLEOSIDE DIPHOSPHATE ESTERS ARE PREAPRED BY REACTING A NUCLEOSIDE MONOPHOSPHATE WITH A PHOSPHORIC ACID ESTER IN THE PRESENCE OF DICYCLOHEXYL CARBODIMIDE, WHEREIN A METHANOL SOLUTION OF A NUCELOSIDE MONOPHOSPHORIC ACID AND DICYCLOHEXYL CARBODIMIDE IS SLOWLY BROUGHT TOGETHER WITH A 1 TO 6.5 PH METHANOL SOLUTION OF A PHOSPHORIC ACID ESTER.
Inventors
- 👤 H Bergmeyer
- 👤 E Haid
- 👤 Hochstetter M Nelboeck
- 👤 G Weimann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:13
CPC Classifications
C; C07; C07H; C07H1/00; C07H1/02
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |