Patent US3100452A successfully refreshed from Google Patents.
US3836611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for prilling urea
Assignee: Individual
•
Filing: 1972-05-22
•
Granted: 1974-09-17
•
Expires: 1992-05-22
Abstract
Abstract UREA IS PRILLED BY SPRAYING UREA DROPLETS DOWNWARDLY INTO A SOLIDIFICATION ZONE WHERE IT IS CONTACTED WITH A SUBSTANTIALLY INERT GAS. PRILLS ARE DIRECTED INTO A COLLECTOR BY DIVERTING THEIR FLOW BY DIRECTING A GAS THROUGH A PERFORATED, INVERTED CONE OR PYRAMID LOCATED AT THE BOTTOM OF AND IN COMMUNICATION WITH SAID ZONE.
Inventors
- 👤 I Mavrovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:52
CPC Classifications
C; C05; C05C; C05C9/00; C05C9/005; B; B01; B01J; B01J2/00; B01J2/02; B01J2/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |