US3159593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of a longlasting stable solution of formaldehyde-melaminecondensation products, and the new stable product thereof
Assignee: Montedison SpA
•
Filing: 1960-05-17
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Granted: 1964-12-01
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Expires: 1980-05-17
Abstract
No abstract record available.
Inventors
- 👤 Morini Marcello
- 👤 Sabatini Tito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:04
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/34; C08K; C08K5/00; C08K5/36; C08K5/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS FOR THE PREPARATION OF A STABLE SOLUTION OF A PRODUCT OF CONDENSATION OF MELAMINE WITH FORMALDEHYDE OBTAINED BY REACTING MELAMINE AND FORMALDEHYDE IN MOLECULAR RATIOS RANGING BETWEEN 1:2AND 1:4 TO GIVE A PARTIAL CONDENSATION PRODUCT, CONSISTING ESSENTIALLY OF ADDING, AS A STABILIZING AGENT, AN ARMATIC SULPHAMIDE TO THE PARTIAL CONDENSATION PRODUCT IN AQEUOUS ALCOHOLIC MEDIUM IN A PROPORTION OF 0.05 TO 0.15 MOL OF SULPHAMIDE PER MOL OF MELAMINE, THE MELAMINE-FORMALDEHYDE PARTIAL CONDENSATION PRODUCT BENG OBTAINED BY REACTING MELAMINE AND FORMALDEHYDE AT 70 TO 140*C. AT A PH FROM 7.5 TO 10.0 AND IN THE PRESENCE OF AN ALIPHATIC ALCOHOL HAVING LESS THAN 4 CARBON ATOMS AND CONTINUING THE CONDENSATION AT LEAST UNTIL THE SULFONAMIDE IS SUBSTANTIALLY COMPLETELY DISSOLVED.
Claim 2
Dependent Claim
121 words
A PROCESS FOR THE PREPARATION OF A STABLE SOLUTION OF A PRODUCT OF CONDENSATION OF MELAMINE WITH FORMALDEHYDE OBTAINED BY REACTING MELAMINE AND FORMALDEHYDE IN MOLECULAR RATIOS RANGING BETWEEN 1:2AND 1:4 TO GIVE A PARTIAL CONDENSATION PRODUCT, CONSISTING ESSENTIALLY OF ADDING, AS A STABILIZING AGENT, AN ARMATIC SULPHAMIDE TO THE PARTIAL CONDENSATION PRODUCT IN AQEUOUS ALCOHOLIC MEDIUM IN A PROPORTION OF 0.05 TO 0.15 MOL OF SULPHAMIDE PER MOL OF MELAMINE, THE MELAMINE-FORMALDEHYDE PARTIAL CONDENSATION PRODUCT BENG OBTAINED BY REACTING MELAMINE AND FORMALDEHYDE AT 70 TO 140*C. AT A PH FROM 7.5 TO 10.0 AND IN THE PRESENCE OF AN ALIPHATIC ALCOHOL HAVING LESS THAN 4 CARBON ATOMS AND CONTINUING THE CONDENSATION AT LEAST UNTIL THE SULFONAMIDE IS SUBSTANTIALLY COMPLETELY DISSOLVED.
References Cited (Backward Citations)
US2377867A
Cited
US2797206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |