US3183200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of liquid urea-formaldehyde condensates and condensates so produced
Assignee: BOOTS HERCULES AGROCHEMICALS Co A PARTNERSHIP OF
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Filing: 1961-04-27
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Granted: 1965-05-11
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Expires: 1981-04-27
Abstract
No abstract record available.
Inventors
- 👤 William B Hewson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:08
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12; C07; C07G; C07G99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A PROCESS FOR THE PREPARATION OF A LIQUID UREAFORMALDEHYDE CONDENSATE CONTAINING UREA IN A MOLE RATIO TO FORMALDEHYDE GREATER THAN 1, THE IMPROVEMENT PROVIDING FOR AN INCREASED STABILITY AND SOLIDS CONTENT OF SAID CONDENSATE, COMPRISING ADMIXING AN AQUEOUS FORMALDEHYDE POLYMETHYLOL UREA CONDENSATE CONTAINING FORMALDEHYDE IN A MOLE RATIO TO UREA GREATER THAN 1 AND CHARACTERIZED BY A SOLIDS CONTENT OF AT LEAST 65 PERCENT, WITH UREA IN AN AMOUNT TO PROVIDE A RESULTING ADMIXTURE CONTAINING UREA TO FORMALDEHYDE IN A MOLE RATIO GREATER THAN 1, AND MAINTAINING THE SAID ADMIXTURE WHILE CONTAINING AT LEAST AN INITIAL PORTION OF THE SAID UREA AT A TEMPERATURE WITHIN THE RANGE OF FROM 90 TO 110*C. AND AT A PH OF FROM 10.4 TO 12 FOR A PERIOD SUFFICIENT TO FROM SAID CONDENSATE.
Claim 2
Dependent Claim
130 words
IN A PROCESS FOR THE PREPARATION OF A LIQUID UREAFORMALDEHYDE CONDENSATE CONTAINING UREA IN A MOLE RATIO TO FORMALDEHYDE GREATER THAN 1, THE IMPROVEMENT PROVIDING FOR AN INCREASED STABILITY AND SOLIDS CONTENT OF SAID CONDENSATE, COMPRISING ADMIXING AN AQUEOUS FORMALDEHYDE POLYMETHYLOL UREA CONDENSATE CONTAINING FORMALDEHYDE IN A MOLE RATIO TO UREA GREATER THAN 1 AND CHARACTERIZED BY A SOLIDS CONTENT OF AT LEAST 65 PERCENT, WITH UREA IN AN AMOUNT TO PROVIDE A RESULTING ADMIXTURE CONTAINING UREA TO FORMALDEHYDE IN A MOLE RATIO GREATER THAN 1, AND MAINTAINING THE SAID ADMIXTURE WHILE CONTAINING AT LEAST AN INITIAL PORTION OF THE SAID UREA AT A TEMPERATURE WITHIN THE RANGE OF FROM 90 TO 110*C. AND AT A PH OF FROM 10.4 TO 12 FOR A PERIOD SUFFICIENT TO FROM SAID CONDENSATE.
References Cited (Backward Citations)
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Cited
US2174535A
Cited
US2944046A
Cited
US2723253A
Cited
US2669551A
Cited
US2859260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |