Patent US3799981A successfully refreshed from Google Patents.
US3799981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of nitrilotriacetamides
Assignee: Hooker Chemical Corp
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Filing: 1972-09-15
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Granted: 1974-02-12
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Expires: 1992-09-15
Abstract
Abstract THERE IS PROVIDED A PROCESS FOR PRODUCING NITRILOTRIACETAMIDES WHICH COMPRISES FORMING A POLYHYDROXY ESTER OFF INGREDIENTS COMPRISING NITRILOTRIACETIC ACID AND A GLYCOL AND THEREAFTER REACTING SAID POLYHYDROXY ESTER WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIA, PRIMARY AMINES, DIMETHYLAMINE AND MIXTURES THEREOF WHERWEIN SAID COMPOUND HAS A DISSOCIATION CONTACT (KB) OF LESS THAT 1X10-7. THE NITRILOTRIACETAMIDES ARE USEFUL AS EPOXY CURING AGENTS AND IS FORMING METHYLOL COMPOUNDS WHICH ARE USED IN PERMANENT PRESS FABRICS MOLDING COMPOUNDS AND THE LIKE.
Inventors
- 👤 D Thorpe
- 👤 G Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:32
CPC Classifications
C; C07; C07C; C07C237/00
Claims Analysis
Total Claims: 0
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |