Patent US3157635A successfully refreshed from Google Patents.
US3157635A
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Sulfonic acid cation exchange resin purification of nucleotides
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1961-07-31
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Granted: 1964-11-17
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Tanaka Kuniyoshi
- 👤 Mizuno Komei
- 👤 Sanno Yasushi
- 👤 Hamuro Yukihiko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:42
CPC Classifications
C; C07; C07H; C07H1/00; B; B01; B01J; B01J39/00; B01J39/04; B01J39/05; B01J47/00; B01J47/014; C07H1/06; C12; C12N; C12N15/00; C12N15/09; C12N15/10; C12N15/1003; C12P; C12P19/00; C12P19/26; C12P19/28; C12P19/30; C12P19/32; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/89; Y10S530/00; Y10S530/82; Y10S530/821
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
PROCESS FOR SEPARATING 5''-NUCLEOTIDES COMPRISING CONTACTING AQUEOUS SOLUTION OF SAID NUCLEOTIDES AT PH OF 1 AND 2, SAID SOLUTION BEING SUBSTANTIALLY FREE OF CATION IMPURITIES, WITH FREE FORM OF SULFONIC ACID CATION EXCHANGE RESIN, AND SUBSEQUENTLY ELUTING SAID NUCLEOTIDES WITH AQUEOUS SODIUM CHLORIDE SOLUTION.
Claim 2
Dependent Claim
44 words
PROCESS FOR SEPARATING 5''-NUCLEOTIDES COMPRISING CONTACTING AQUEOUS SOLUTION OF SAID NUCLEOTIDES AT PH OF 1 AND 2, SAID SOLUTION BEING SUBSTANTIALLY FREE OF CATION IMPURITIES, WITH FREE FORM OF SULFONIC ACID CATION EXCHANGE RESIN, AND SUBSEQUENTLY ELUTING SAID NUCLEOTIDES WITH AQUEOUS SODIUM CHLORIDE SOLUTION.
References Cited (Backward Citations)
US2870139A
Cited
US2891945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |