US2698844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nucleosides
Assignee: Zellsloff Fabrik Waldhof AG
•
Filing: 1950-01-20
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Granted: 1955-01-04
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Expires: 1970-01-20
Abstract
No abstract record available.
Inventors
- 👤 Dimroth Karl Josef
- 👤 Holle Kurt Georg Viktor
- 👤 Reiner E Hamm
- 👤 Jaenicke Lothar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:07
CPC Classifications
C; C07; C07H; C07H1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN A METHOD OF PRODUCING NUCLEOSIDES BY HYDROLYTIC CLEAVAGE OF NUCLEIC ACID, THE STEP COMPRISING HEATING NUCLEIC ACID, THE STEP COMPRISING HEATING NUCLEIC ACID IN AN AQUEOUS SOLUTION, SAID SOLUTION BEIN ADJUSTED TO A PH VALUE OF APPROXIMATELY 6.5-7.5 IN THE PRESENCE OF A METAL COMPOUND CAPABLE OF COMBINING WITH THE PHOSPHORIC ACID SPLIT OFF AT THE CLEAVING TO FORM INSOLUBLE PHOSPHATES, THE METAL IN SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF LEAD AND ZINC
Claim 2
Dependent Claim
77 words
IN A METHOD OF PRODUCING NUCLEOSIDES BY HYDROLYTIC CLEAVAGE OF NUCLEIC ACID, THE STEP COMPRISING HEATING NUCLEIC ACID, THE STEP COMPRISING HEATING NUCLEIC ACID IN AN AQUEOUS SOLUTION, SAID SOLUTION BEIN ADJUSTED TO A PH VALUE OF APPROXIMATELY 6.5-7.5 IN THE PRESENCE OF A METAL COMPOUND CAPABLE OF COMBINING WITH THE PHOSPHORIC ACID SPLIT OFF AT THE CLEAVING TO FORM INSOLUBLE PHOSPHATES, THE METAL IN SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF LEAD AND ZINC
References Cited (Backward Citations)
US2152662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |