US3190742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a slow-acting and quick-acting nitrogenous fertilizer mixture containing crotylidenediurea
Assignee: BASF SE
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Filing: 1963-09-16
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Granted: 1965-06-22
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Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 Brandeis Hans
- 👤 Petersen Harro
- 👤 Fikentscher Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:09
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C07D239/08; C07D239/10; C05; C05C; C05C9/00; C05C9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A PROCESS FOR PRODUCING A SLOW-ACTING AND QUICK-ACTING NITROGENOUS FERTILIZER MIXTURE CONTAINING CROTYLIDENEDIUREA AND OTHER CONDENSATION PRODUCTS OF UREA AND ACETALDEHYDE, SAID COMPRISING REACTING AT 30-100*C. UREA AND ACETALDEHYDE IN A MOLAR RATIO OF UREA TO ACETALDEHYDE IN THE RANGE FROM EQUAL MOLS UP TO 2:1, RESPECTIVELY, IN WATER MAINTAINED AT AN ACID PH OF AT LEAST 1.5, MAINTAINING THE PH OF THE REACTION MIXTURE AT 1.5-3.0 TOWARD THE END OF THE REACTION AND THEREBY FORMING INSOLUBLE CONDENSATION PRODUCTS OF UREA AND ACETALDEHYDE CONSISTING ESSENTIALLY OF CROTYLIDENEDIUREA IN A MOTHER LIQUOR, THEN ADJUSTING THE PH OF THE MOTHER LIQUOR TO A VALUE IN THE RANGE OF 5-9, AND THEN DRYING THE INSOLUBLE CONDENSATION PRODUCTS FORMED INT HE REACTION TOGETHER WITH A SUFFICIENT PORTION OF SAID ADJUSTED MOTHER LIQUOR TO PRODUCE A FERTILIZER COMPOSITION HAVING A NITROGEN CONTENT DISENGAGEABLE WITH UREASE OF 10 TO 50%, THE VALUES FOR SAID NITROGEN CONTENT DISENGAGEABLE WITH UREASE FROM A COLD AQUEOUS SOLUTION AND A HOT AQUEOUS SOLUTION BEING ABOUT EQUAL.
Claim 2
Dependent Claim
166 words
A PROCESS FOR PRODUCING A SLOW-ACTING AND QUICK-ACTING NITROGENOUS FERTILIZER MIXTURE CONTAINING CROTYLIDENEDIUREA AND OTHER CONDENSATION PRODUCTS OF UREA AND ACETALDEHYDE, SAID COMPRISING REACTING AT 30-100*C. UREA AND ACETALDEHYDE IN A MOLAR RATIO OF UREA TO ACETALDEHYDE IN THE RANGE FROM EQUAL MOLS UP TO 2:1, RESPECTIVELY, IN WATER MAINTAINED AT AN ACID PH OF AT LEAST 1.5, MAINTAINING THE PH OF THE REACTION MIXTURE AT 1.5-3.0 TOWARD THE END OF THE REACTION AND THEREBY FORMING INSOLUBLE CONDENSATION PRODUCTS OF UREA AND ACETALDEHYDE CONSISTING ESSENTIALLY OF CROTYLIDENEDIUREA IN A MOTHER LIQUOR, THEN ADJUSTING THE PH OF THE MOTHER LIQUOR TO A VALUE IN THE RANGE OF 5-9, AND THEN DRYING THE INSOLUBLE CONDENSATION PRODUCTS FORMED INT HE REACTION TOGETHER WITH A SUFFICIENT PORTION OF SAID ADJUSTED MOTHER LIQUOR TO PRODUCE A FERTILIZER COMPOSITION HAVING A NITROGEN CONTENT DISENGAGEABLE WITH UREASE OF 10 TO 50%, THE VALUES FOR SAID NITROGEN CONTENT DISENGAGEABLE WITH UREASE FROM A COLD AQUEOUS SOLUTION AND A HOT AQUEOUS SOLUTION BEING ABOUT EQUAL.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |