US3271386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-amino-4-imidazolecarboxamide riboside recovery process
Assignee: Pfizer Inc
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Filing: 1964-06-01
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Granted: 1966-09-06
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Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 Hsing T Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:47
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/26; C12P19/28; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/8215; Y10S435/822; Y10S435/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR THE RECOVERY OF 5-AMINO-4-IMIDAZOLECARBOXAMIDE RIBOSIDE FROM A FERMENTATON BROTH CONTAINING THE SAME WHICH COMPRISES CONTACTING SAID FERMENTATION BROTH AT A PH OF FROM ABOUT 1 TO ABOUT 3 WITH A STRONG CATION EXCHANGE RESIN IN THE HYDROGEN CYCLE, ELUTING SAID RESIN WITH AMMONIUM HYDROXIDE, CONCENTRATING THE ELUATE, CONTACTING SAID CONCENTRATE AT A PH OF ABOUT 9 TO 10 WITH A STRONG ANION EXCHANGE RESIN OPERATING IN EITHER THE FORMATE OR THE ACETATE CYCLE, AND ELUTING SAID RESIN WITH WATER.
Claim 2
Dependent Claim
82 words
A PROCESS FOR THE RECOVERY OF 5-AMINO-4-IMIDAZOLECARBOXAMIDE RIBOSIDE FROM A FERMENTATON BROTH CONTAINING THE SAME WHICH COMPRISES CONTACTING SAID FERMENTATION BROTH AT A PH OF FROM ABOUT 1 TO ABOUT 3 WITH A STRONG CATION EXCHANGE RESIN IN THE HYDROGEN CYCLE, ELUTING SAID RESIN WITH AMMONIUM HYDROXIDE, CONCENTRATING THE ELUATE, CONTACTING SAID CONCENTRATE AT A PH OF ABOUT 9 TO 10 WITH A STRONG ANION EXCHANGE RESIN OPERATING IN EITHER THE FORMATE OR THE ACETATE CYCLE, AND ELUTING SAID RESIN WITH WATER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |