Patent US3290285A successfully refreshed from Google Patents.
US3290285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of production of 5'-guanylic acid
Assignee: Asahi Kasei Corp
•
Filing: 1964-02-19
•
Granted: 1966-12-06
•
Expires: 1984-02-19
Abstract
No abstract record available.
Inventors
- 👤 Senoo Saburo
- 👤 Yano Nobumitsu
- 👤 Kato Toshio
- 👤 Hayashi Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:36
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/16; C07H19/20; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR PRODUCING 5''-GUANYLIC ACID COMPRISING ADDING TO A SOLUTION CONTAINING 5''-GUANYLIC ACID AND AT LEAST ONE IMPURITY SUBSTANCE, AND ALKALI HYDROXIDE, ADJUSTING THE PH OF SAID SOLUTION TO A VALUE BETWEEN 1.0 AND 5.0, COOLING THE SAID SOLUTION, AND FILTERING GUANYLIC ACID AND ITS ALKALI METAL WHICH CRYSTALLIZES.
Claim 2
Dependent Claim
50 words
A PROCESS FOR PRODUCING 5''-GUANYLIC ACID COMPRISING ADDING TO A SOLUTION CONTAINING 5''-GUANYLIC ACID AND AT LEAST ONE IMPURITY SUBSTANCE, AND ALKALI HYDROXIDE, ADJUSTING THE PH OF SAID SOLUTION TO A VALUE BETWEEN 1.0 AND 5.0, COOLING THE SAID SOLUTION, AND FILTERING GUANYLIC ACID AND ITS ALKALI METAL WHICH CRYSTALLIZES.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |