US3701772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nucleotide anhydrides
Assignee: Yamasa Shoyu KK
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Filing: 1970-06-01
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Granted: 1972-10-31
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Expires: 1990-06-01
Abstract
Abstract NUCLEOTIDE ANHYDRIDES CAN BE SYNTHESIZED, IN EACH CASE, BY A SINGLE-STEP PROCESS BY CAUSING A NUCLEOSIDE-5''-MONOPHOSPHATE AND DIPHENYL PHOSPHOROCHLORIDATE OR TETRAPHENYL PYROPHOSPHATE TO REACT IN A SUITABLE SOLVENT AND IN THE PRESENCE OF AN ALKYLAMINE AND THEN ADDING TO THE RESULTING PROCESS MATERIALS ALKYLAMMONIUM SALT OF AN ACID DISSOLVED IN PYRIDINE OR ONE OF ITS DERIVATIVES.
Inventors
- 👤 Kiminori Tamura
- 👤 Manami Morozumi
- 👤 Yutaka Noda
- 👤 Morio Suzuki
- 👤 Hiroshi Yoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:03
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06; C07H19/10; C07H1/00; C07H1/02; C07H19/16; C07H19/20
Claims Analysis
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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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |