Patent US3218149A successfully refreshed from Google Patents.
US3218149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making fertilizer, mulch and soil conditioner
Assignee: Chesapeake Corp of Virginia
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Filing: 1963-02-25
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Granted: 1965-11-16
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Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 Reavis C Sproull
- 👤 Gene A Pierce
- 👤 Raymond M Tokarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:49
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/52; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A PROCESS FOR PRODUCING A PLANT FOOD, THE STEPS OF: (A) PRE-HEATING COMMINUTED LIGNOCELLULOSE MATERIAL IN A STREAM ENVIRONMENT TO A TEMPERATURE OF BETWEEN 160*F. AND 180*F.; (B) PRE-HEATING AN AQUEOUS SOLUTION OF UREA, PHOSPHORIC ACID, AMMONIA AND POTASSIUM CHLORIDE TO A TEMPERATURE OF BETWEEN 130*F. AND 150*F.; (C) THEN AGITATINGLY REACTING THE PRE-HEATED COMMINUTED LIGNOCELLULOSE MATERIAL WITH THE PRE-HEATED AQUEOUS SOLUTION FOR APPROXIMATELY FIVE MINUTES WHEREBY NITROGEN, PHOSPHOROUS, AND POTASSIUM COMPOUNDS ARE CHEMICALLY BONDED WITHIN SAID MATERIAL; (D) THEREAFTER DRYING THE REACTED MATERIAL AT A TEMPERATURE BELOW 230*F. UNTIL THE MOISTURE CONTENT THEREOF IS APPROXIMATELY 20%; AND (E) RECOVERING THE DRIED REACTED MATERIAL.
Claim 2
Dependent Claim
105 words
IN A PROCESS FOR PRODUCING A PLANT FOOD, THE STEPS OF: (A) PRE-HEATING COMMINUTED LIGNOCELLULOSE MATERIAL IN A STREAM ENVIRONMENT TO A TEMPERATURE OF BETWEEN 160*F. AND 180*F.; (B) PRE-HEATING AN AQUEOUS SOLUTION OF UREA, PHOSPHORIC ACID, AMMONIA AND POTASSIUM CHLORIDE TO A TEMPERATURE OF BETWEEN 130*F. AND 150*F.; (C) THEN AGITATINGLY REACTING THE PRE-HEATED COMMINUTED LIGNOCELLULOSE MATERIAL WITH THE PRE-HEATED AQUEOUS SOLUTION FOR APPROXIMATELY FIVE MINUTES WHEREBY NITROGEN, PHOSPHOROUS, AND POTASSIUM COMPOUNDS ARE CHEMICALLY BONDED WITHIN SAID MATERIAL; (D) THEREAFTER DRYING THE REACTED MATERIAL AT A TEMPERATURE BELOW 230*F. UNTIL THE MOISTURE CONTENT THEREOF IS APPROXIMATELY 20%; AND (E) RECOVERING THE DRIED REACTED MATERIAL.
References Cited (Backward Citations)
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |