US2511487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of iminodiacetonitrile
Assignee: EIDP Inc
•
Filing: 1946-08-08
•
Granted: 1950-06-13
•
Expires: 1966-08-08
Abstract
No abstract record available.
Inventors
- 👤 Henry T Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:11
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR THE SYNTHESIS OF IMINODIACETONITRILE WHICH COMPRISES HEATING AMINOACETONITRILE WITH FORMALDEHYDE CYANHYDRIN AT A TEMPERATURE OF ABOUT 100* TO 150*C., IN THE PRESENCE OF ABOUT 0.001 TO 0.5% OF A MINERAL ACID STABILIZER BASED ON THE INITIAL WEIGHT OF THE FORMALDEHYDE CYANHYDRIN, THE INITIAL MOLAL RATIO OF AMINOACETONITRILE TO FORMALDEHYDE CYANHYDRIN BEING ABOUT 1:0.3 TO 1:1.5, AND THEREAFTER SEPARATING IMINODIACETONITRILE FROM THE RESULTING MIXTURE.
Claim 2
Dependent Claim
66 words
A PROCESS FOR THE SYNTHESIS OF IMINODIACETONITRILE WHICH COMPRISES HEATING AMINOACETONITRILE WITH FORMALDEHYDE CYANHYDRIN AT A TEMPERATURE OF ABOUT 100* TO 150*C., IN THE PRESENCE OF ABOUT 0.001 TO 0.5% OF A MINERAL ACID STABILIZER BASED ON THE INITIAL WEIGHT OF THE FORMALDEHYDE CYANHYDRIN, THE INITIAL MOLAL RATIO OF AMINOACETONITRILE TO FORMALDEHYDE CYANHYDRIN BEING ABOUT 1:0.3 TO 1:1.5, AND THEREAFTER SEPARATING IMINODIACETONITRILE FROM THE RESULTING MIXTURE.
References Cited (Backward Citations)
GB388874A
Cited
US2085679A
Cited
DE638071C
Cited
DE673590C
Cited
US2205995A
Cited
US2175805A
Cited
US2228271A
Cited
US2407645A
Cited
US2405966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |