US4035479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delayed and sustained urea release compositions
Assignee: LES PRODUITS ORGANIQUES DU-SANTERRE-ORSAN SA
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Filing: 1975-11-14
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Granted: 1977-07-12
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Expires: 1995-11-14
Abstract
Abstract Delayed and sustained urea release compositions comprising association products with acrylic acid polymers, for ruminant feed supplementation.
Inventors
- 👤 Henry H. George, Jr.
- 👤 Sol J. Barer
- 👤 Charles L. Smart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:14
CPC Classifications
A; A23; A23K; A23K50/00; A23K50/10; A23K50/15; A23K40/00; A23K40/30; A23K40/35
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
In feed supplement rations for ruminants comprising an association product of a minor proportion of urea and a major proportion of carboxy vinyl polymer, the improvement which consists of incorporating with said association product a minor effective proportion of an alpha olefin polymer, whereby urea release rates are extended.
Claim 2
Dependent Claim
49 words
In feed supplement rations for ruminants comprising an association product of a minor proportion of urea and a major proportion of carboxy vinyl polymer, the improvement which consists of incorporating with said association product a minor effective proportion of an alpha olefin polymer, whereby urea release rates are extended.
Claim 3
Dependent Claim
16 words
The feed supplement rations of claim 1, wherein said alpha olefin polymer is an ethylene polymer.
Claim 4
Dependent Claim
17 words
The feed supplement rations of claim 2, wherein said alpha olefin polymer is an ethylene-vinyl acetate copolymer.
Claim 5
Dependent Claim
21 words
The feed supplement rations of claim 1, wherein the proportion of alpha olefin polymer:association product is at least 95:5 by weight.
Claim 6
Dependent Claim
20 words
The feed supplement rations of claim 1, exhibiting a urea release rate (Ur 1/2) of at least about 5 hours.
References Cited (Backward Citations)
US3629392A
Cited
US3660562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |