Patent US3322528A successfully refreshed from Google Patents.
US3322528A
Expired / Lapsed
US
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Fertilizer compositions consisting of isobutylidene-diurea and method of using
Assignee: Individual
•
Filing: 1961-08-22
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Granted: 1967-05-30
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Expires: 1981-08-22
Abstract
No abstract record available.
Inventors
- 👤 Hamamoto Masao
- 👤 Sakaki Yasuhiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:20
CPC Classifications
C; C05; C05C; C05C9/00; C05C9/02; C07; C07C; C07C273/00; C07C273/18; C07C273/1854; C07C273/1863
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A METHOD OF FERTILIZING THE SOIL WHICH COMPRISES DISTRIBUTING OVER SAID SOIL THE CONDENSATION REACTION PRODUCT OF ISOBUTYL ALDEHYDE WITH UREA IN WHICH THE RATIO OF UREA TO THE ALDEHYDE IS AT LEAST 2 TO 1.
References Cited (Backward Citations)
US2264400A
Cited
US2157541A
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US2572256A
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US2592809A
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US2729611A
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US2960534A
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US3054669A
Cited
US3061641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |