US3687808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic polynucleotides
Assignee: Leland Stanford Junior University
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Filing: 1969-08-14
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Granted: 1972-08-29
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Expires: 1989-08-14
Abstract
Abstract POLYNUCLEOTIDES HAVING SULFUR REPLACING ONE OR MORE OF THE OXYGEN ATOMS BONDED TO PHOSPHORUS ARE PREPARED BGY POLYMERIZING A MONONUCLEOTIDE IN WHICH THE PHOSPHORUS IS PRESENT IN THE FORM OF A PHOSPHOROTHIAOTE HAVING ONE OR MORE SULFUR ATOMS BONDED TO THE PHOSPHORUS. A SUITABLE BIOCATALYST IS USED TO EFFECT POLYMERIZATION AND WHERE NECESSARY A BIOTEMPLATE IS ALSO USED. THE RESULTING POLYNUCLEOTIDE THIO-ANALOGUES HAVE ENHANCED INTERFERON INDUCING PROPERTIES.
Inventors
- 👤 Thomas C Merigan Jr
- 👤 Fritz Eckstein
- 👤 Eric Desire Alice De Clercq
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:11
CPC Classifications
C; C07; C07H; C07H21/00
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |