US3070435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of non-caking fertilizers
Assignee: Phillips Petroleum Co
•
Filing: 1956-04-12
•
Granted: 1962-12-25
•
Expires: 1976-04-12
Abstract
No abstract record available.
Inventors
- 👤 Robert E Reusser
- 👤 Van C Vives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:48
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/30; C; C05; C05G; C05G5/00; C05G5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A METHOD FOR IMPROVING THE STORAGE STABILITY OF A GRANULAR NITROGEN-CONTAINING FERTILIZER WHICH NORMALLY TENDS TO CAKE ON STANDING WHICH COMPRISES UNIFORMLY COATING THE FERTILIZER GRANULES WITH AN AGENT COMPRISING FINELY DIVIDED ANHYDROUS MAGNESIUM SULFATE BY TUMBLING THE SAME WITH SAID GRANULAR FERTILIZER, THE AMOUNT OF SAID ANHYDROUS MAGNESIUM SULFATE EMPLOYED BEING SUFFICIENT TO REDUCE THE TENDENCY OF SAID FERTILIZER TO CAKE ON STANDING.
Claim 2
Independent Claim
64 words
A METHOD FOR IMPROVING THE STORAGE STABILITY OF A GRANULAR NITROGEN-CONTAINING FERTILIZER WHICH NORMALLY TENDS TO CAKE ON STANDING WHICH COMPRISES UNIFORMLY COATING THE FERTILIZER GRANULES WITH AN AGENT COMPRISING FINELY DIVIDED ANHYDROUS MAGNESIUM SULFATE BY TUMBLING THE SAME WITH SAID GRANULAR FERTILIZER, THE AMOUNT OF SAID ANHYDROUS MAGNESIUM SULFATE EMPLOYED BEING SUFFICIENT TO REDUCE THE TENDENCY OF SAID FERTILIZER TO CAKE ON STANDING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |