Patent US3190877A successfully refreshed from Google Patents.
US3190877A
Expired / Lapsed
US
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Crystalline sodium salt of 5'-guanylic acid and a method for preparing the same
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1963-02-13
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Granted: 1965-06-22
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Expires: 1983-02-13
Abstract
No abstract record available.
Inventors
- 👤 Ishibashi Joichi
- 👤 Ito Kikuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:36
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/16; C07H19/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
CRYSTALLINE DISODIUM SALT OF 5''-GUANYLIC ACID.
Claim 2
Dependent Claim
6 words
CRYSTALLINE DISODIUM SALT OF 5''-GUANYLIC ACID.
Claim 3
Independent Claim
69 words
A METHOD FOR PREPARING CRYSTALLINE DISODIUM SALT OF 5H-GUANYLIC ACID, WHICH COMPRISES DISSOLVING A MEMBER SELECTED FROM THE GROUP CONSISTING OF 5''-GUANYLIC ACID AND THE SODIUM SALT OF 5''-GUANYLIC ACID IN A SOLUTION HAVING AN ALKALINE PH, LEAVING SAID MEMBER IN SAID SOLUTION UNTIL AMORPHOUS DISODIUM SALT OF 5''-GUANYLIC ACID IS PRECIPITATED, AND LEAVING SAID AMORPHOUS SALT IN SAID SOLUTION UNTIL CRYSTALLINE DISODIUM SALT OF 5''-GUANYLIC ACID IS FORMED.
Claim 4
Independent Claim
69 words
A METHOD FOR PREPARING CRYSTALLINE DISODIUM SALT OF 5H-GUANYLIC ACID, WHICH COMPRISES DISSOLVING A MEMBER SELECTED FROM THE GROUP CONSISTING OF 5''-GUANYLIC ACID AND THE SODIUM SALT OF 5''-GUANYLIC ACID IN A SOLUTION HAVING AN ALKALINE PH, LEAVING SAID MEMBER IN SAID SOLUTION UNTIL AMORPHOUS DISODIUM SALT OF 5''-GUANYLIC ACID IS PRECIPITATED, AND LEAVING SAID AMORPHOUS SALT IN SAID SOLUTION UNTIL CRYSTALLINE DISODIUM SALT OF 5''-GUANYLIC ACID IS FORMED.
References Cited (Backward Citations)
US2549827A
Cited
US2653897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |