Patent US3060192A successfully refreshed from Google Patents.
US3060192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of enantiomers of alphamethyl-phenethyl hydrazine and intermediate
Assignee: Olin Corp
•
Filing: 1959-04-29
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Granted: 1962-10-23
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Expires: 1979-04-29
Abstract
No abstract record available.
Inventors
- 👤 Bernstein Jack
- 👤 Kathryn A Losee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:32
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
3 words
PYROGLUTAMIC ACID,N''-(A-METHYL-PHENETHYL) HYDRAZIDE.
Claim 2
Dependent Claim
3 words
PYROGLUTAMIC ACID,N''-(A-METHYL-PHENETHYL) HYDRAZIDE.
Claim 3
Independent Claim
42 words
THE METHOD WHICH COMPRISES REACTING PHENYL-2-PROPANONE WITH L-PYROGLUTAMIC ACID HYDRAZIDE, REDUCING THE RESULTING N-L-PYROGLUTAMOYL-N''-(A-METHYL-PHENETHYLIDENE) HYDRAZINE TO OBTAIN A MIXTURE OF THE DIASTEREOISOMERS OF N-L-PYROGLUTAMONYL-N''-(A-METHYL-PHENETHYL)-HYDRAZINE, SEPARATING THE MIXTURE INTO ITS DIASTEROISOMERIC COMPONENTS AND HYDROLYZING EACH COMPONENT TO OBTAIN THE CORRESPONDING ENANTIOMER OF A-METHYL-PHENETHYLHYDRAZINE.
Claim 4
Independent Claim
42 words
THE METHOD WHICH COMPRISES REACTING PHENYL-2-PROPANONE WITH L-PYROGLUTAMIC ACID HYDRAZIDE, REDUCING THE RESULTING N-L-PYROGLUTAMOYL-N''-(A-METHYL-PHENETHYLIDENE) HYDRAZINE TO OBTAIN A MIXTURE OF THE DIASTEREOISOMERS OF N-L-PYROGLUTAMONYL-N''-(A-METHYL-PHENETHYL)-HYDRAZINE, SEPARATING THE MIXTURE INTO ITS DIASTEROISOMERIC COMPONENTS AND HYDROLYZING EACH COMPONENT TO OBTAIN THE CORRESPONDING ENANTIOMER OF A-METHYL-PHENETHYLHYDRAZINE.
References Cited (Backward Citations)
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US2743276A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |