US3337607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of an amine nitrile
Assignee: —
•
Filing: —
•
Granted: 1967-08-22
•
Expires: 1984-08-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:17
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
PROCESS FOR THE PREPARATION OF NITRILOTRIACETONITRILE, SAID PROCESS COMPRISING (1) ADDING HCN TO A MIXTURE OF WATER, FORMALDEHYDE, AND AN AMMONIUM SALT SELECTED FROM THE CLASS CONSISTING OF AMMONIUM CHLORIDE, AMMONIUM PHOSPHATE, AND AMMONIUM SULFATE, SAID MIXTURE HAVING AN ACIDIC PH AND BEING FURTHER CHARACTERIZED IN THAT THE AMOUNT OF SAID FORMALDEHYDE (RELATIVE TO THE AMOUNT OF SAID AMMONIUM SALT) IS FROM ABOUT 2.4 PERCENT LESS THAN STOICHIOMETRIC, TO 10 PERCENT GREATER THAN STOICHIOMETRIC, SUCH THAT THE AMOUNT OF HCN ADDED IS WITHIN 10 PERCENT OF THE STOICHIOMETRIC AMOUNT (BASED ON THE AMOUNT OF SAID AMMONIUM SALT); AND (2) MAINTAINING THE REACTION MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 5* TO ABOUT 100*C., WHEREBY SAID NITRILOTRIACETONITRILE IS OBTAINED.
Claim 2
Dependent Claim
121 words
PROCESS FOR THE PREPARATION OF NITRILOTRIACETONITRILE, SAID PROCESS COMPRISING (1) ADDING HCN TO A MIXTURE OF WATER, FORMALDEHYDE, AND AN AMMONIUM SALT SELECTED FROM THE CLASS CONSISTING OF AMMONIUM CHLORIDE, AMMONIUM PHOSPHATE, AND AMMONIUM SULFATE, SAID MIXTURE HAVING AN ACIDIC PH AND BEING FURTHER CHARACTERIZED IN THAT THE AMOUNT OF SAID FORMALDEHYDE (RELATIVE TO THE AMOUNT OF SAID AMMONIUM SALT) IS FROM ABOUT 2.4 PERCENT LESS THAN STOICHIOMETRIC, TO 10 PERCENT GREATER THAN STOICHIOMETRIC, SUCH THAT THE AMOUNT OF HCN ADDED IS WITHIN 10 PERCENT OF THE STOICHIOMETRIC AMOUNT (BASED ON THE AMOUNT OF SAID AMMONIUM SALT); AND (2) MAINTAINING THE REACTION MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 5* TO ABOUT 100*C., WHEREBY SAID NITRILOTRIACETONITRILE IS OBTAINED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |