Patent US2745865A successfully refreshed from Google Patents.
US2745865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cyanohydrins
Assignee: Monsanto Chemicals Ltd
•
Filing: 1953-02-27
•
Granted: 1956-05-15
•
Expires: 1973-02-27
Abstract
No abstract record available.
Inventors
- 👤 Glen E Journeay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:09
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR PREPARING A CYANOHYDRIN WHICH COMPRISES REACTING HYDROCYANIC ACID WITH A COMPOUND FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES, IN THE LIQUID PHASE, IN A SOLVENT MEDIUM, AND IN THE PRESENCE OF A CATALYST COMPRISING A MIXTURE OF PYRIDINE AND AN ALIPHATIC MONOCARBOXYLIC ACID HAVING FROM 1 TO 6 CARBON ATOMS.
Claim 2
Dependent Claim
54 words
A PROCESS FOR PREPARING A CYANOHYDRIN WHICH COMPRISES REACTING HYDROCYANIC ACID WITH A COMPOUND FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES, IN THE LIQUID PHASE, IN A SOLVENT MEDIUM, AND IN THE PRESENCE OF A CATALYST COMPRISING A MIXTURE OF PYRIDINE AND AN ALIPHATIC MONOCARBOXYLIC ACID HAVING FROM 1 TO 6 CARBON ATOMS.
References Cited (Backward Citations)
US2166600A
Cited
GB359262A
Cited
US1984415A
Cited
US2101823A
Cited
US2090942A
Cited
US2175805A
Cited
GB585644A
Cited
US2623896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |