US2859218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of glutamic acid
Assignee: EIDP Inc
•
Filing: 1955-08-01
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Granted: 1958-11-04
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Expires: 1975-08-01
Abstract
No abstract record available.
Inventors
- 👤 Marcus A Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:53
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/76; C07D307/34; C07D307/56; C07D307/60; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/912
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
THE METHOD OR PRODUCING 5-(B-CARBOXYETHYL) HYDANTOIN COMPRISING PHOTO-CHEMICALLY OXIDIXING FURFURAL IN A SOLUTION OF A LOWER ALIPHATIC ALCOHOL; CATALYTICALLY HYDROGENATING THE RESULTING 2-KETO-5-ALKOXYDIHYDROFURAN TO OBTAIN THE CORRESPONDING 2-KETO-5ALKOXYTETRAHYDROFURAN; AND REACTING THE LATTER COMPOUND, A COMPOUND YIELDING CYANIDE IONS, A COMPOUND YIELDING AMMONIUM IONS AND A COMPOUND YIELDING CARBONATE IONS TO OBTAIN SAID 5-(B-CARBOXYETHYL) HYDANTOIN.
Claim 2
Independent Claim
54 words
THE METHOD OR PRODUCING 5-(B-CARBOXYETHYL) HYDANTOIN COMPRISING PHOTO-CHEMICALLY OXIDIXING FURFURAL IN A SOLUTION OF A LOWER ALIPHATIC ALCOHOL; CATALYTICALLY HYDROGENATING THE RESULTING 2-KETO-5-ALKOXYDIHYDROFURAN TO OBTAIN THE CORRESPONDING 2-KETO-5ALKOXYTETRAHYDROFURAN; AND REACTING THE LATTER COMPOUND, A COMPOUND YIELDING CYANIDE IONS, A COMPOUND YIELDING AMMONIUM IONS AND A COMPOUND YIELDING CARBONATE IONS TO OBTAIN SAID 5-(B-CARBOXYETHYL) HYDANTOIN.
Claim 3
Independent Claim
30 words
THE METHOD FOR PRODUCING 5-(B-CARBOXYETHYL) HYDANTOIN COMPRISING REACTING IN AN AQUEOUS MEDIUM A 2KETO-5-ALKOXYETRAHYDROFURAN, A COMPOUND YIELDING CYANIDE IONS, A COMPOUND YIELDING AMMONIUM IONS AND A COMPOUND YIELDING CARBONATE IONS.
Claim 4
Independent Claim
30 words
THE METHOD FOR PRODUCING 5-(B-CARBOXYETHYL) HYDANTOIN COMPRISING REACTING IN AN AQUEOUS MEDIUM A 2KETO-5-ALKOXYETRAHYDROFURAN, A COMPOUND YIELDING CYANIDE IONS, A COMPOUND YIELDING AMMONIUM IONS AND A COMPOUND YIELDING CARBONATE IONS.
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |