US3811931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal container coated with photodegradable composition
Assignee: Ecoplastics Ltd
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Filing: 1972-02-07
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Granted: 1974-05-21
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Expires: 1992-02-07
Abstract
Abstract A disposable substrate of degradable material, such as a metal container, is provided with a photodegradable polymeric coating. The coating is water impermeable initially, but upon exposure to ultraviolet light degrades to become water permeable allowing water to contact and assist in degradation of the substrate. Suitable coatings are polymers containing side chain ketone groups, such as copolymers of vinyl monomers and vinyl ketones.
Inventors
- 👤 J Guillet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:28
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/08; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G69/00; C08G69/02; C08G85/00; C08K; C08K5/00; C08K5/0008; C08K5/0033; C08L; C08L57/00; C08L57/04; C09D133/00; C09D133/04; C09D133/14; C09D133/18; C09D133/20; C09D5/00; C09D5/32; C08L2201/00; C08L2201/06; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
A metal container as claimed in claim 1 in which the resin is applied to the surface of the container from a liquid coating formulation.
Claim 2
Dependent Claim
33 words
A metal container as claimed in claim 1 in which the resin is cross-linked after it is applied to the substrate so as to impart water resistance and water impermeability to the resin.
Claim 3
Dependent Claim
31 words
A metal container according to claim 1 wherein the vinyl monomer is ethylene, styrene, methyl acrylate, methyl methacrylate, methacrylonitrile, acrylonitrile, butadiene, isoprene, vinyl acetate, vinyl chloride, acrylic acid or methacrylic acid.
Claim 4
Dependent Claim
40 words
A metal container according to claim 4 wherein the vinyl ketone is methyl vinyl ketone, ethyl vinyl ketone, propyl vinyl ketone, isopropyl vinyl ketone, butyl vinyl ketone, methyl isopropenyl ketone, ethyl isopropenyl ketone, methyl isobutenyl ketone or phenyl vinyl ketone.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |