US3256247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamino derivatives of levulinic hydantoin and process of making same
Assignee: Argus Chemical Corp
•
Filing: 1961-02-07
•
Granted: 1966-06-14
•
Expires: 1981-02-07
Abstract
No abstract record available.
Inventors
- 👤 Domenick D Gagliardi
- 👤 Jr William J Jutras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:00
CPC Classifications
C; C08; C08G; C08G73/00; Y; Y10; Y10S; Y10S525/00; Y10S525/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR PREPARING RESINOUS POLYAMINO POLYMERS FROM LEVULINIC HYDANTOIN WHICH COMPRISES REACTING AT TEMPERATURES FROM 150*C. TO 200*C. LEVULINIC HYDANTOIN AND A POLYFUNCTIONAL POLYAMINO COMPOUND SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DIAMINE, DIETHYLENE TRIAMINE, TRIETHYLENE TETRAMINE, TETRAETHYLENE PENTAMINE, MONOETHANOLAMINE, DIETHANOLAMINE, TRIETHANOLAMINE, AMINOETHYL ETHANOLAMINE, IMINOUREA, GUANYLUREA, DICYANDIAMIDE, HEXAMETHYLENE DIAMINE, PHENYLENE DIAMINE, AND P,P''-DIAMINODIPHENYLMETHANE IN EQUIMOLAR PROPORTION, UNTIL THE REACTION IS COMPLETE AS INDICATED WHEN NO FURTHER LOSS OF WEIGHT IS OBSERVED.
Claim 2
Dependent Claim
72 words
A PROCESS FOR PREPARING RESINOUS POLYAMINO POLYMERS FROM LEVULINIC HYDANTOIN WHICH COMPRISES REACTING AT TEMPERATURES FROM 150*C. TO 200*C. LEVULINIC HYDANTOIN AND A POLYFUNCTIONAL POLYAMINO COMPOUND SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DIAMINE, DIETHYLENE TRIAMINE, TRIETHYLENE TETRAMINE, TETRAETHYLENE PENTAMINE, MONOETHANOLAMINE, DIETHANOLAMINE, TRIETHANOLAMINE, AMINOETHYL ETHANOLAMINE, IMINOUREA, GUANYLUREA, DICYANDIAMIDE, HEXAMETHYLENE DIAMINE, PHENYLENE DIAMINE, AND P,P''-DIAMINODIPHENYLMETHANE IN EQUIMOLAR PROPORTION, UNTIL THE REACTION IS COMPLETE AS INDICATED WHEN NO FURTHER LOSS OF WEIGHT IS OBSERVED.
References Cited (Backward Citations)
US2169546A
Cited
US2658912A
Cited
US2892817A
Cited
US2870201A
Cited
US2956853A
Cited
US2917490A
Cited
US2985541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |