US3485580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing granular diammonium phosphate
Assignee: PETRO CHEM CO Inc
•
Filing: 1967-05-12
•
Granted: 1969-12-23
•
Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 Philip B Mischel
- 👤 John W Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:31
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/405; B; B01; B01J; B01J2/00; B01J2/30; C01B25/28; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2905532A
Cited
US3325276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |