US2928728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate compositions
Assignee: Monsanto Chemicals Ltd
•
Filing: 1956-07-23
•
Granted: 1960-03-15
•
Expires: 1976-07-23
Abstract
No abstract record available.
Inventors
- 👤 Lloyd E Weeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:41
CPC Classifications
C; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A METHOD OF PRODUCING AN AMMONIUM PHOSPHATE SOLUTION WITH MINMIZED SLUDGE FORMING CHARACTERISTICS FROM WET PROCESS PHOSPHORIC ACID PREPARED FROM SPENT ALKYLATION ACID, WHICH METHOD COMPRISES ADDING A MINOR PROPORTION OF A POLYOXYETHLENE THIOETHER OF THE CLASS
Claim 2
Independent Claim
37 words
A METHOD OF PRODUCING AN AMMONIUM PHOSPHATE SOLUTION WITH MINMIZED SLUDGE FORMING CHARACTERISTICS FROM WET PROCESS PHOSPHORIC ACID PREPARED FROM SPENT ALKYLATION ACID, WHICH METHOD COMPRISES ADDING A MINOR PROPORTION OF A POLYOXYETHLENE THIOETHER OF THE CLASS
References Cited (Backward Citations)
US1264513A
Cited
US1876011A
Cited
US2037706A
Cited
US2525178A
Cited
US2629696A
Cited
US2677700A
Cited
US2746921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |