Patent US3336128A successfully refreshed from Google Patents.
US3336128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating a plant nutrient with phenol formaldehyde, urea and furfuryl alcohol
Assignee: International Minerals and Chemical Corp
•
Filing: 1964-07-20
•
Granted: 1967-08-15
•
Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Melville J Holik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:10
CPC Classifications
C; C05; C05G; C05G5/00; C05G5/30; C05G5/37; C05G3/00; C05G3/40; C05G3/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR THE PREPARATION OF A PLANT NUTRIENT COMPOSITION HAVING SLOW RELEASE PROPERTIES IN SOIL WHICH COMPRISES PROGRESSIVELY FORMING, AT A TEMPERATURE IN TEH RANGE BETWEEN ABOUT 50 AND ABOUT 90*C., ON THE SURFACE OF A GRANULAR WATER-SOLUBLE PLANT NUTRIENT MATERIAL FROM ABOUT 5 TO ABOUT 30% BY WEIGHT OF A WATER RESISTANT POLYMER COATING BY A SERIES OF MINERAL ACID-CATALYZED AQUEOUS POLYMERIZATION REACTIONS BETWEEN PHENOL, FORMALDEHYDE, UREA AND FURFURYL ALCOHOL, THE PROPORTION OF FURFURYL ALCOHOL TO THE OTHER REACTANTS BEING PROGRESSIVELY INCREASED SO THAT THE OUTERMOST ORTION OF SAID WATER RESISTANT POLYMER COATING CONTAINS A HIGHER PROPORTION OF FURFURYL ALCOHOL THAN THE INNERMOST, THE FIRST OF SAID POLYMERIZATION REACTIONS HAVING PRESENT IN THE REACTION MEDIUM A PROTEINACEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF CASEIN, ALBUMIN, ZEIN AND GELATIN.
Claim 2
Dependent Claim
131 words
A PROCESS FOR THE PREPARATION OF A PLANT NUTRIENT COMPOSITION HAVING SLOW RELEASE PROPERTIES IN SOIL WHICH COMPRISES PROGRESSIVELY FORMING, AT A TEMPERATURE IN TEH RANGE BETWEEN ABOUT 50 AND ABOUT 90*C., ON THE SURFACE OF A GRANULAR WATER-SOLUBLE PLANT NUTRIENT MATERIAL FROM ABOUT 5 TO ABOUT 30% BY WEIGHT OF A WATER RESISTANT POLYMER COATING BY A SERIES OF MINERAL ACID-CATALYZED AQUEOUS POLYMERIZATION REACTIONS BETWEEN PHENOL, FORMALDEHYDE, UREA AND FURFURYL ALCOHOL, THE PROPORTION OF FURFURYL ALCOHOL TO THE OTHER REACTANTS BEING PROGRESSIVELY INCREASED SO THAT THE OUTERMOST ORTION OF SAID WATER RESISTANT POLYMER COATING CONTAINS A HIGHER PROPORTION OF FURFURYL ALCOHOL THAN THE INNERMOST, THE FIRST OF SAID POLYMERIZATION REACTIONS HAVING PRESENT IN THE REACTION MEDIUM A PROTEINACEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF CASEIN, ALBUMIN, ZEIN AND GELATIN.
References Cited (Backward Citations)
US2945322A
Cited
US3233518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |