US3235370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing stable urea-formaldehyde suspension and product
Assignee: JBS USA LLC
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Filing: 1964-10-21
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Granted: 1966-02-15
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Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Kealy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:49
CPC Classifications
C; C05; C05C; C05C9/00; C05C9/02; C05G; C05G5/00; C05G5/20; C05G5/27
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A COMPOSITION COMPRISING A FLOWABLE MIXTURE OF SUBSTANTIALLY NCONDENSED UREA, FORMALDEHYDE, WATER AND A SUFFICIENT AMOUNT OF AN INORGNIC ALKALINE MATERIAL TO IMPART A PH OF BETWEEN ABOUT 10 AND 14 TO SAID MIXTURE, SAID MIXTURE HAVING A TEMPERATURE ABOVE 85*C. A UREA TO FORMALDEHYDE MOL RATIO OF BETWEEN ABOUT 1.3 AND 2.75 TO 1 AND CONTAINING NOT MORE THAN ABOUT 88% SOLIDS, SAID COMPOSITION BEING SUBSTANTIALLY STABLE FOR AT LEAST 30 DAYS.
Claim 2
Dependent Claim
73 words
A COMPOSITION COMPRISING A FLOWABLE MIXTURE OF SUBSTANTIALLY NCONDENSED UREA, FORMALDEHYDE, WATER AND A SUFFICIENT AMOUNT OF AN INORGNIC ALKALINE MATERIAL TO IMPART A PH OF BETWEEN ABOUT 10 AND 14 TO SAID MIXTURE, SAID MIXTURE HAVING A TEMPERATURE ABOVE 85*C. A UREA TO FORMALDEHYDE MOL RATIO OF BETWEEN ABOUT 1.3 AND 2.75 TO 1 AND CONTAINING NOT MORE THAN ABOUT 88% SOLIDS, SAID COMPOSITION BEING SUBSTANTIALLY STABLE FOR AT LEAST 30 DAYS.
Claim 3
Independent Claim
100 words
A METHOD OF PREPARING A SUBSTANTIALLY STABLE SUSPENSION OF UREA AND FORMALDEHYDE WHICH IS A FLOWABLE MIXTURE AT AMBIENT TEMPERATURE FOR AT LEAST ABOUT 30 DAYS WHICH COMPRISES: PREPARING A FLOWABLE MIXTURE OF UREA, FORMALDEHYDE, WATER, AND A SUFFICIENT AMOUNT OF AN INORGANIC ALKALINE MATERIAL SO AS TO RAISE THE PH OF THE MIXTURE ABOVE 10, SAID MIXTURE HAVING A UREA TO FORMALDEHYDE MOL RATIO OF BETWEEN ABOUT 1.3 TO 1 AND 2.75 TO 1; MAINTAINING SAID MIXTURE AT A REACTION TEMPERATURE ABOVE ABOUT 85*C. FOR AT LEAST ABOUT 5 MINUTES, AND COOLING THE RESULTANT SUSPENSION TO ABOUT ROOM TEMPERATURE.
Claim 4
Independent Claim
100 words
A METHOD OF PREPARING A SUBSTANTIALLY STABLE SUSPENSION OF UREA AND FORMALDEHYDE WHICH IS A FLOWABLE MIXTURE AT AMBIENT TEMPERATURE FOR AT LEAST ABOUT 30 DAYS WHICH COMPRISES: PREPARING A FLOWABLE MIXTURE OF UREA, FORMALDEHYDE, WATER, AND A SUFFICIENT AMOUNT OF AN INORGANIC ALKALINE MATERIAL SO AS TO RAISE THE PH OF THE MIXTURE ABOVE 10, SAID MIXTURE HAVING A UREA TO FORMALDEHYDE MOL RATIO OF BETWEEN ABOUT 1.3 TO 1 AND 2.75 TO 1; MAINTAINING SAID MIXTURE AT A REACTION TEMPERATURE ABOVE ABOUT 85*C. FOR AT LEAST ABOUT 5 MINUTES, AND COOLING THE RESULTANT SUSPENSION TO ABOUT ROOM TEMPERATURE.
References Cited (Backward Citations)
US2467212A
Cited
US2592809A
Cited
US2766283A
Cited
US2864685A
Cited
US2955930A
Cited
US2916371A
Cited
US3096168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |