US4014675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fertilizer stick
Assignee: BOOTS HERCULES AGROCHEMICALS Co A PARTNERSHIP OF
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Filing: 1974-12-05
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Granted: 1977-03-29
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Expires: 1994-12-05
Abstract
Abstract This invention relates to a fertilizer stick composed of water soluble thermoplastic material and dispersed therein about 10 to about 80% of fertilizer material. The fertilizer stick gradually dissolves when placed in a potting medium or soil to supply plant growth nutrients to the roots of a plant.
Inventors
- 👤 George E. Osburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
C; C05; C05B; C05B1/00; C05B1/04; C05G; C05G5/00; C05G5/10; C05G5/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
58 words
A fertilizer stick consisting essentially of water-soluble hydroxypropyl cellulose having an M.S. of 2-10 and dispersed therein about 10 to about 80% by weight of fertilizer material, based on the weight of the total composition, said stick having substantially the same cross-sectional area throughout its length except for the end portion adapted to be inserted into the soil.
Claim 2
Dependent Claim
58 words
A fertilizer stick consisting essentially of water-soluble hydroxypropyl cellulose having an M.S. of 2-10 and dispersed therein about 10 to about 80% by weight of fertilizer material, based on the weight of the total composition, said stick having substantially the same cross-sectional area throughout its length except for the end portion adapted to be inserted into the soil.
Claim 3
Dependent Claim
29 words
A fertilizer stick of claim 1 wherein said fertilizer material is a combination of fertilizer ingredients to provide each of the primary plant growth nutrients, nitrogen phosphorus and potassium.
Claim 4
Dependent Claim
22 words
A fertilizer stick of claim 2 wherein said fertilizer material additionally contains the trace elements boron, copper, iron, manganese, molybdenum and zinc.
Claim 5
Dependent Claim
20 words
A fertilizer stick of claim 2 wherein said fertilizer material comprises a combination of particulate ureaform, triple superphosphate and potash.
Claim 6
Dependent Claim
21 words
A fertilizer stick of claim 4 wherein said particulate ureaform contains the trace elements boron, copper, iron, manganese, molybdenum and zinc.
Claim 7
Dependent Claim
31 words
A method of supplying plant growth nutrients to a plant growing in soil which comprises placing into the soil adjacent the roots of the plant the fertilizer stick of claim 1.
Claim 8
Dependent Claim
30 words
A method of supplying plant growth nutrients to a potted plant which comprises placing into the potting medium adjacent the roots of the plant the fertilizer stick of claim 1.
Claim 9
Dependent Claim
16 words
A fertilizer stick of claim 1 wherein said water-soluble hydroxypropyl cellulose has an M.S. of 3-5.
References Cited (Backward Citations)
US667467A
Cited
US1948117A
Cited
US1988307A
Cited
US1971390A
Cited
US2091993A
Cited
US2032608A
Cited
US2298232A
Cited
US2380721A
Cited
US2982394A
Cited
US3059379A
Cited
US3057713A
Cited
US3060012A
Cited
US3267857A
Cited
US3192032A
Cited
US3192033A
Cited
US3290821A
Cited
US3232007A
Cited
US3502458A
Cited
US3647416A
Cited
US3852421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |