US2770538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid fertilizers
Assignee: Individual
•
Filing: 1954-08-11
•
Granted: 1956-11-13
•
Expires: 1974-08-11
Abstract
No abstract record available.
Inventors
- 👤 Donald E Vierling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
C; C05; C05B; C05B7/00; Y; Y10; Y10S; Y10S47/00; Y10S47/10; Y10S71/00; Y10S71/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE METHOD OF MANUFACTURING A LIQUID FERTILIZER WHICH COMPRISES ADDING TO WATER SUFFICIENT POTASSIUM HYDROXIDE TO OBTAIN THE DESIRED PERCENTAGE OF POTASSIUM OXIDE, ADDING SUFFICIENT PHOSPHORIC ACID TO OBTAIN THE DESIRED PERCENTAGE OF PHOSPHOROUS PENTOXIDE, NEUTRALIZING THE PHOSPHORIC ACID WITH AMMONIA AND ADDING SUFFICIENT UREA TO PROVIDE THE DESIRED AMOUNT OF ORGANIC NITROGEN, SAID ORGANIC NITROGEN AVOIDING FAST ASSIMILATION OF NITROGEN.
Claim 2
Independent Claim
61 words
THE METHOD OF MANUFACTURING A LIQUID FERTILIZER WHICH COMPRISES ADDING TO WATER SUFFICIENT POTASSIUM HYDROXIDE TO OBTAIN THE DESIRED PERCENTAGE OF POTASSIUM OXIDE, ADDING SUFFICIENT PHOSPHORIC ACID TO OBTAIN THE DESIRED PERCENTAGE OF PHOSPHOROUS PENTOXIDE, NEUTRALIZING THE PHOSPHORIC ACID WITH AMMONIA AND ADDING SUFFICIENT UREA TO PROVIDE THE DESIRED AMOUNT OF ORGANIC NITROGEN, SAID ORGANIC NITROGEN AVOIDING FAST ASSIMILATION OF NITROGEN.
References Cited (Backward Citations)
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Cited
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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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |