US2807626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salt of amino acid
Assignee: International Minerals and Chemical Corp
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Filing: 1954-09-13
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Granted: 1957-09-24
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Expires: 1974-09-13
Abstract
No abstract record available.
Inventors
- 👤 William G Skelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:50
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/16; A; A61; A61K; A61K31/00; A61K31/28; A61K31/295; A61K33/00; A61K33/24; A61K33/26; C07F; C07F15/00; C07F15/02; C07F15/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR PREPARING FERROUS PYRROLIDONECARBOXYLATE WHICH COMPRISES REACTING AN ALKALINE EARTH METAL SALT OF PYRROLIDONECARBOXYLIC ACID WITH A WATER-SOLUBLE INORGANIC FERROUS SALT, THE ANION OF WHICH FORMS A WATER INSOLUBLE SALT WITH THE ALKALINE EARTH METAL, IN THE PRESENCE OF METALLIC IRON IN AN ATMOSPHERE OF AN NON-OXIDIZING GAS INERT UNDER THE REACTION CONDITIONS OBTAINING.
Claim 2
Dependent Claim
56 words
A PROCESS FOR PREPARING FERROUS PYRROLIDONECARBOXYLATE WHICH COMPRISES REACTING AN ALKALINE EARTH METAL SALT OF PYRROLIDONECARBOXYLIC ACID WITH A WATER-SOLUBLE INORGANIC FERROUS SALT, THE ANION OF WHICH FORMS A WATER INSOLUBLE SALT WITH THE ALKALINE EARTH METAL, IN THE PRESENCE OF METALLIC IRON IN AN ATMOSPHERE OF AN NON-OXIDIZING GAS INERT UNDER THE REACTION CONDITIONS OBTAINING.
References Cited (Backward Citations)
DE264391C
Cited
US2474989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |