US2904424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agricultural product and method
Assignee: Peerless Oil and Gas Co
•
Filing: 1954-06-11
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Granted: 1959-09-15
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Expires: 1974-06-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward P Chapman
- 👤 John A Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:28
CPC Classifications
C; C05; C05D; C05D9/00; Y; Y10; Y10S; Y10S71/00; Y10S71/904
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A METHOD OF PREPARING A LONG LIFE FERTILIZER COMPRISING INTERMIXING PERLITE ORE WITH AT LEAST ONE PLANT NUTRIENT SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE SALTS OF POTASSIUM, SODIUM, CALCIUM, MAGNESIUM, IRON, ALUMINUM, MANGANESE, ZINC, COPPER, COBALT, BORON AND MOLYB DENUM, INCLUDING THE SULPHUR, PHOSPHORUS, NITROGEN AND CHLORINE SALTS THEREOF; AND THEREAFTER EXPANDING THE SAME BY HEATING AT A TEMPERATURE OF 1500* TO 2000*F. TO GIVE A PERLITE PRODUCT IMPREGNATED WITH PLANT NUTRIENT.
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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |