US2606904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of guanamines
Assignee: —
•
Filing: —
•
Granted: 1952-08-12
•
Expires: 1969-08-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:54
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/48; C07C; C07C209/00; C07C209/44; C07C209/48; C07C255/00; C07C255/01; C07C255/24; C07D251/14; C07D251/16; C07D251/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN THE METHOD OF PREPARING A GUANAMINE BY REACTING A HIGHER FATTY ACID NITRILE OF THE GROUP CONSISTING OF ALKYL AND ALKENYL NITRILES CONTAINING AT LEAST EIGHT CARBON ATOMS WITH DICYANDIAMIDE IN A HYDROXYLATED INERT SOLVENT IN THE PRESENCE OF A HIGHLY BASIC CARALYST THE IMPROVEMENT THAT COMPRISES ADDING THE DICYANDIAMIDE TO THE DISSOLVED NITRILE OVER A PERIOD OF TIME AT LEAST ONE HOUR.
Claim 2
Dependent Claim
64 words
IN THE METHOD OF PREPARING A GUANAMINE BY REACTING A HIGHER FATTY ACID NITRILE OF THE GROUP CONSISTING OF ALKYL AND ALKENYL NITRILES CONTAINING AT LEAST EIGHT CARBON ATOMS WITH DICYANDIAMIDE IN A HYDROXYLATED INERT SOLVENT IN THE PRESENCE OF A HIGHLY BASIC CARALYST THE IMPROVEMENT THAT COMPRISES ADDING THE DICYANDIAMIDE TO THE DISSOLVED NITRILE OVER A PERIOD OF TIME AT LEAST ONE HOUR.
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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |