US2605253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea resins containing dimethylamino substituents
Assignee: Rohm and Haas Co
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Filing: 1950-12-16
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Granted: 1952-07-29
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Expires: 1970-12-16
Abstract
No abstract record available.
Inventors
- 👤 Robert W Auten
- 👤 Vincent C Meunier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:00
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/043; C08G12/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
AS A NEW COMPOSITION OF MATTER, A WATERSOLUBLE THERMOSETTING RESINOUS PRODUCT HAVING A VISCOSITY OF AT LEAST 0.5 POISE WHEN MEASURED AS A 50% AQUEOUS SOLUTION AT 25* C. OBTAINED BY CHEMICALLY REACTING AS THE ESSENTIAL REACTANTS UREA, FORMALDEHYDE, AND DIMETHYLAMINE IN AQUEOUS SOLUTION AT A PH OF 7 TO 10 AND AT A TEMPERATURE FROM ABOUT 60* C. TO THE BOILING POINT OF THE SOLUTION, AND THEN POLYMERIZING THE RESULTANT MIXTURE AT A TEMPERATURE FROM ABOUT 60* C. TO THE REFLUXING TEMPERATURE AT A PH FROM ABOUT 1.5 TO ABOUT 6.8, THE FORMALDEHYDE BEING REACTED IN AN AMOUNT FROM 2.0 TO 3.0 MOLES PER MOLE OF UREA AND THE DIMETHYLAMINE BEING REACTED IN AN AMOUNT FROM 0.05 TO 0.5 MOLE PER MOLE OF UREA.
Claim 2
Dependent Claim
125 words
AS A NEW COMPOSITION OF MATTER, A WATERSOLUBLE THERMOSETTING RESINOUS PRODUCT HAVING A VISCOSITY OF AT LEAST 0.5 POISE WHEN MEASURED AS A 50% AQUEOUS SOLUTION AT 25* C. OBTAINED BY CHEMICALLY REACTING AS THE ESSENTIAL REACTANTS UREA, FORMALDEHYDE, AND DIMETHYLAMINE IN AQUEOUS SOLUTION AT A PH OF 7 TO 10 AND AT A TEMPERATURE FROM ABOUT 60* C. TO THE BOILING POINT OF THE SOLUTION, AND THEN POLYMERIZING THE RESULTANT MIXTURE AT A TEMPERATURE FROM ABOUT 60* C. TO THE REFLUXING TEMPERATURE AT A PH FROM ABOUT 1.5 TO ABOUT 6.8, THE FORMALDEHYDE BEING REACTED IN AN AMOUNT FROM 2.0 TO 3.0 MOLES PER MOLE OF UREA AND THE DIMETHYLAMINE BEING REACTED IN AN AMOUNT FROM 0.05 TO 0.5 MOLE PER MOLE OF UREA.
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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |