US5254283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isophthalic polymer coated particles
Assignee: Eastman Kodak Co
•
Filing: 1991-01-17
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Granted: 1993-10-19
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Expires: 2011-01-17
Abstract
Abstract The invention relates to use of a water dispersible isophthalic acid polymer as a dust free coating on particulates. The particles provide a timed release of the contents of the particle which allows for reduced amounts of active agents on the coatings and less interference between active agents in the coating or environment and the particulates.
Inventors
- 👤 Raymond E. Arnold
- 👤 Nathaniel T. Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:28
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/3715; C11D17/00; C11D17/0039; C11D3/38; C11D3/386; C11D3/38645; C11D3/38672
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
38 words
A particulate enzyme containing material coated with a continuous layer capable of delaying the release of at least a portion of the particulate enzyme containing material in aqueous solutions, said layer comprising a non-water soluble isophthalic acid polymer.
Claim 2
Dependent Claim
38 words
A particulate enzyme containing material coated with a continuous layer capable of delaying the release of at least a portion of the particulate enzyme containing material in aqueous solutions, said layer comprising a non-water soluble isophthalic acid polymer.
Claim 3
Dependent Claim
11 words
A particulate material according to claim 1 further comprising a detergent.
Claim 4
Dependent Claim
20 words
A particulate material according to claim 1 wherein the isophthalic acid polymer is poly [82/18-isophthalic acid/5-sodiosulfonoisophthalic acid 54/46 diethyleneglycol/1,4-cyclohexane dimethanol].
Claim 5
Dependent Claim
17 words
A particulate material according to claim 1 further comprising an enzyme protecting agent, masking agent or pigment.
Claim 6
Dependent Claim
14 words
A particulate material according to claim 4 wherein the pigment is TiO 2 .
Claim 7
Dependent Claim
15 words
A particulate material according to claim 4 wherein the enzyme protecting agent is ammonium sulfate.
Claim 8
Dependent Claim
16 words
A particulate material according to claim 1 wherein the polymer is crosslinked with multivalent cation salts.
Claim 9
Dependent Claim
15 words
A particulate material according to claim 7 wherein the multivalent cation salt is aluminum sulfate.
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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) | 1996-10-18 | 1997-04-19 | 1997-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-18 | 2001-04-19 | 2001-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-18 | 2005-04-19 | 2005-10-19 | $7700.00 | Window Closed / Lapsed |