US2769005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of melamine
Assignee: —
•
Filing: —
•
Granted: 1956-10-30
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Expires: 1973-10-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:58
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/54; C07D251/56; C07D251/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR PREPARING MELAMINE WHICH COMPRISES HEATING UREA AT 130-150* C. IN A CONTINUOUS STREAM OF ANHYDROUS AMMONIA WHEREBY WATER FORMED AS A BYPRODUCT IS REMOVED FROM THE REACTION ZONE SUBSTANTIALLY AS SOON AS IT IS FORMED AND THEREAFTER HEATING THE PRODUCT AT 200-300* C. IN A CONTINUOUS STREAM OF ANHYDROUS AMMONIA WHEREBY THE MELAMINE FORMED IS FORMED FROM THE REACTION ZONE AS SOON AS IT IS FORMED.
Claim 2
Dependent Claim
69 words
A PROCESS FOR PREPARING MELAMINE WHICH COMPRISES HEATING UREA AT 130-150* C. IN A CONTINUOUS STREAM OF ANHYDROUS AMMONIA WHEREBY WATER FORMED AS A BYPRODUCT IS REMOVED FROM THE REACTION ZONE SUBSTANTIALLY AS SOON AS IT IS FORMED AND THEREAFTER HEATING THE PRODUCT AT 200-300* C. IN A CONTINUOUS STREAM OF ANHYDROUS AMMONIA WHEREBY THE MELAMINE FORMED IS FORMED FROM THE REACTION ZONE AS SOON AS IT IS FORMED.
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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |