US2720540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sarcosine
Assignee: EIDP Inc
•
Filing: 1954-05-07
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Granted: 1955-10-11
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Expires: 1974-05-07
Abstract
No abstract record available.
Inventors
- 👤 Waldo R Caverly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:32
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/01; C07C255/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN THE PROCESS OF PREPARING SARCOSINE BY REACTION OF AN ALKALI-METAL CYANIDE WITH FORMALDEHYDE FOLLOWED BY REACTION WITH METHYLAMINE AND HYDROLYSIS OF THE NITRILE, THE IMPROVEMENT WHICH CONSISTS OF CARRYING OUT ALL STEPS IN THE PRESENCE OF AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF THE ALKALI-METAL AND ALKALINE-EARTH HYPCHLORITES, ALKALI-METAL NITRITES, ALKALI-METAL PEROXIDES, ALKALI-METAL PERBORATES AND HYDROGEN PEROXIDE, THE CONCENTRATION OF OXIDIZING AGENT BEING AT LEAST ENOUGH TO GIVE IN THE REACTION MASS A POSITIVE TEST WITH STARCH-IODIDE TEST PAPER.
Claim 2
Dependent Claim
82 words
IN THE PROCESS OF PREPARING SARCOSINE BY REACTION OF AN ALKALI-METAL CYANIDE WITH FORMALDEHYDE FOLLOWED BY REACTION WITH METHYLAMINE AND HYDROLYSIS OF THE NITRILE, THE IMPROVEMENT WHICH CONSISTS OF CARRYING OUT ALL STEPS IN THE PRESENCE OF AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF THE ALKALI-METAL AND ALKALINE-EARTH HYPCHLORITES, ALKALI-METAL NITRITES, ALKALI-METAL PEROXIDES, ALKALI-METAL PERBORATES AND HYDROGEN PEROXIDE, THE CONCENTRATION OF OXIDIZING AGENT BEING AT LEAST ENOUGH TO GIVE IN THE REACTION MASS A POSITIVE TEST WITH STARCH-IODIDE TEST PAPER.
References Cited (Backward Citations)
US2175805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |