US3076701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonium phosphate fertilizer and preparation thereof
Assignee: Dow Chemical Co
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Filing: 1954-10-25
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Granted: 1963-02-05
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Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
- 👤 Albert E Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:43
CPC Classifications
C; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN THE MANUFACTURE OF AMMONIUM FERTILIZERS CHARACTERIZED BY THE NEUTRALIZATION OF AN ACID SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID, SULFURIC ACID, NITRIC ACID AND MIXTURES THEREOF, WITH GASEOUS AMMONIA THE IMPROVEMENT WHICH COMPRISES ADDING TO THE SAID ACID PRIOR TO AMMONIATION A CHELATING AID ACID IN SOLUTION, SAID CHELATING AGENT CORRESPONDING TO THE FOLLOWING GENERIC FORMULA:
Claim 2
Dependent Claim
58 words
IN THE MANUFACTURE OF AMMONIUM FERTILIZERS CHARACTERIZED BY THE NEUTRALIZATION OF AN ACID SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID, SULFURIC ACID, NITRIC ACID AND MIXTURES THEREOF, WITH GASEOUS AMMONIA THE IMPROVEMENT WHICH COMPRISES ADDING TO THE SAID ACID PRIOR TO AMMONIATION A CHELATING AID ACID IN SOLUTION, SAID CHELATING AGENT CORRESPONDING TO THE FOLLOWING GENERIC FORMULA:
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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |