Patent US3558630A successfully refreshed from Google Patents.
US3558630A
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US
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Process for preparing 3,5-dioxo-1-piperazineacetamide and nitrilotriacetic acid triamide
Assignee: WR Grace and Co
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Filing: 1967-09-20
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Granted: 1971-01-26
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Expires: 1987-09-20
Abstract
Abstract NITRILOTRIACETIC ACID IS REACTED WITH AN AMIDE TO FORM 3,5-DIOXO-1-PIPERAZINEACETAMIDE WHICH IS REACTED WITH AMMONIA OR AMMONIUM HYDROXIDE TO FORM NITRILOTRIACETIC ACID TRIAMIDE.
Inventors
- 👤 Joseph D Moyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:23
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/06; C07D241/08
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |