US3065238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 1, 3, 4-oxdiazoles
Assignee: BASF SE
•
Filing: 1959-03-13
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Granted: 1962-11-20
•
Expires: 1979-03-13
Abstract
No abstract record available.
Inventors
- 👤 Weidinger Hans
- 👤 Kranz Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:55
CPC Classifications
C; C07; C07D; C07D271/00; C07D271/02; C07D271/10; C07D271/107; C07D413/00; C07D413/02; C07D413/04; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR THE PREPARATION OF 1,3,4-OXIDIAZOLES WHICH COMPRISES REACTING A MONOACYL HYDRAZIDE SELECTED FROM THE GROUP CONSISTING OF ACETOHYDRAZIDE, BENZHYDRAZIDE, 1-AMINOANTHRAQUINONE-2-CARBOXYLIC ACID HYDRAZIDE, 1,4-DIAMINOANTHRAQUINONE -2- CARBOXYLIC ACID HYDRAZIDE, TEREPHTHALIC ACID DIHYDRAZIDE, ISONICOTINIC ACID HYDRAZIDE, HEXAHYDROBENZHYDRAZIDE, SUCCINIC ACID HYDRAZIDE, SUCCINIC ACID DIHYDRAZIDE, ISOPHTHALIC ACID DIHYDRAZIDE, WITH AN IMIDO-ETHER HYDROCHLORIDE SELECTED FROM THE GROUP CONSISTING OF BENZIMIDOETHYL ETHER HYDROCHLORIDE, ACETIC ACID IMIDOETHYL ETHER HYDROCHLORIDE, ISOPHTHALIC ACID BISIMIDOETHYL ETHER HYDROCHLORIDE, SUCCINIC ACID BIS-IMIDOETHYL ETHER HYDROCHLORIDE, TEREPHTHALIC ACID BIS-IMIODETHYL ETHER HYDROCHLORIDE, FORMIMIDOETHYL ETHER HYDROCHLORIDE, M-TOLIMIDOETHYL ETHER HYDROCHLORIDE, M-NITROBENZIMIDOETHYL ETHER HYDROCHLORIDE, AND HEXAHYDROBENZIMIDOETHYL ETHER HYDROCHLORIDE IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AND AT A TEMPERATURE OF FROM ABOUT 70*C. TO ABOUT 220*C.
Claim 2
Dependent Claim
110 words
A PROCESS FOR THE PREPARATION OF 1,3,4-OXIDIAZOLES WHICH COMPRISES REACTING A MONOACYL HYDRAZIDE SELECTED FROM THE GROUP CONSISTING OF ACETOHYDRAZIDE, BENZHYDRAZIDE, 1-AMINOANTHRAQUINONE-2-CARBOXYLIC ACID HYDRAZIDE, 1,4-DIAMINOANTHRAQUINONE -2- CARBOXYLIC ACID HYDRAZIDE, TEREPHTHALIC ACID DIHYDRAZIDE, ISONICOTINIC ACID HYDRAZIDE, HEXAHYDROBENZHYDRAZIDE, SUCCINIC ACID HYDRAZIDE, SUCCINIC ACID DIHYDRAZIDE, ISOPHTHALIC ACID DIHYDRAZIDE, WITH AN IMIDO-ETHER HYDROCHLORIDE SELECTED FROM THE GROUP CONSISTING OF BENZIMIDOETHYL ETHER HYDROCHLORIDE, ACETIC ACID IMIDOETHYL ETHER HYDROCHLORIDE, ISOPHTHALIC ACID BISIMIDOETHYL ETHER HYDROCHLORIDE, SUCCINIC ACID BIS-IMIDOETHYL ETHER HYDROCHLORIDE, TEREPHTHALIC ACID BIS-IMIODETHYL ETHER HYDROCHLORIDE, FORMIMIDOETHYL ETHER HYDROCHLORIDE, M-TOLIMIDOETHYL ETHER HYDROCHLORIDE, M-NITROBENZIMIDOETHYL ETHER HYDROCHLORIDE, AND HEXAHYDROBENZIMIDOETHYL ETHER HYDROCHLORIDE IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AND AT A TEMPERATURE OF FROM ABOUT 70*C. TO ABOUT 220*C.
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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |