US5173535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastics containing sustained release of functional materials
Assignee: Certis USA LLC
•
Filing: 1988-02-11
•
Granted: 1992-12-22
•
Expires: 2008-02-11
Abstract
Abstract Plastic materials having distributed therein discrete particles of crosslinked polymers having functional material entrapped within the polymer lattices during the in situ polymerization of the monomers forming the polymer for the purpose of a controlled release of the functional material.
Inventors
- 👤 Eric S. Abrutyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:56
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; A; A01; A01N; A01N25/00; A01N25/08; A01N25/10; A01N25/18; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8105; A61K8/8117; A61K8/817; A61K8/8176; A61K9/00; A61K9/14; A61K9/16; A61K9/1605; A61K9/1629; A61K9/1635; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/46; A61L9/00; A61L9/015; A61L9/04; A61L9/042; A61Q; A61Q13/00; C; C08; C08K; C08K9/00; C08K9/12; C09; C09B; C09B67/00; C09B67/0097; A61K2800/00; A61K2800/40; A61K2800/56; A61L2300/00; A61L2300/40; A61L2300/404
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
A plastic composition having a functional material suited for performing a specific function when said functional material is released from said plastic composition, which plastic composition comprises: a thermoplastic polymeric substrate selected from the group consisting of polyurethane, polyolefin, polyvinyl chloride, acrylic and cellulose, and a crosslinked polymer having said functional material trapped within its polymer lattice, the crosslinked polymer selected from the group consisting of a polymer of styrene and divinylbenzene and a polymer of di and triacrylate esters, said crosslinked polymer being present as discrete particles within said thermoplastic polymeric substrate.
Claim 2
Dependent Claim
93 words
A plastic composition having a functional material suited for performing a specific function when said functional material is released from said plastic composition, which plastic composition comprises: a thermoplastic polymeric substrate selected from the group consisting of polyurethane, polyolefin, polyvinyl chloride, acrylic and cellulose, and a crosslinked polymer having said functional material trapped within its polymer lattice, the crosslinked polymer selected from the group consisting of a polymer of styrene and divinylbenzene and a polymer of di and triacrylate esters, said crosslinked polymer being present as discrete particles within said thermoplastic polymeric substrate.
Claim 3
Dependent Claim
37 words
The plastic composition of claim 1 wherein said discrete particles comprise from about 5% to about 95% by weight of a crosslinked polymer lattice and from about 95% to about 5% by weight of entrapped functional material.
Claim 4
Dependent Claim
22 words
The plastic composition of claim 2 wherein said discrete particles comprise a crosslinked polymer which is styrene-divinylbenzene and an entrapped functional material.
Claim 5
Dependent Claim
37 words
The plastic composition of claim 1 wherein the thermoplastic polymeric substrate is a polyolefin and the crosslinked polymer is a polymer of styrene and divinylbenzene containing one of a biocide and a pesticide as the functional material.
References Cited (Backward Citations)
US3857932A
Cited
US4202880A
Cited
US4291980A
Cited
US4587129A
Cited
US4309509A
Cited
US4339550A
Cited
EP0061701A2
Cited
US4724240A
Cited
US4590111A
Cited
US4906694A
Cited
EP0201214A2
Cited
EP0252463A2
Cited
US5008332A
Cited
US4788164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-22 | 1996-06-22 | 1996-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-22 | 2000-06-22 | 2000-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-22 | 2004-06-22 | 2004-12-22 | $7700.00 | Window Closed / Lapsed |