US3705659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erodable material
Assignee: WILLIAM L MACKIE
•
Filing: 1970-09-18
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Granted: 1972-12-12
•
Expires: 1990-09-18
Abstract
Abstract An improved material useful for a multitude of purposes which will dissolve or degrade in a short period of time when exposed to water, water vapor or sunlight. The material includes an intermediate layer of water soluble thermoplastic material with a layer of polyethylene film on both sides thereof. When the material is exposed to normal atmospheric conditions, the intermediate water soluble layer will ultimately dissolve. The thin outer and inner layers will degrade to a powdery film.
Inventors
- 👤 William L Mackie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:37
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B65; B65D; B65D65/00; B65D65/38; B65D65/46; B65D65/466; B32B2307/00; B32B2307/70; B32B2307/716; B32B2307/7166; B32B2323/00; B32B2323/04; B32B2439/00; Y; Y10; Y10S; Y10S220/00; Y10S220/30; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/26; Y10T428/263; Y10T428/266; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31909
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
The disposable container of claim 1 wherein said means for opening the container includes: a pull tab mounted on the top surface of said container and attached to a scored strip of the polyethylene outer layer of said container wall; thus the top surface of said container is conventionally removed while simultaneously removing a narrow band of the outer polyethylene material which exposes the water soluble intermediate layer to environmental moisture dissolving the same while the outer and inner layers degrade to a powder.
Claim 2
Dependent Claim
12 words
The disposable container of claim 2 wherein said container is a can.
Claim 3
Dependent Claim
148 words
A disposable container which is degraded by the natural elements of the environment, the structure of the container consisting essentially of: an interior layer of water soluble resinous material selected from the group consisting of ethylene oxide, water soluble polyvinyl alcohol, carboxymethyl cellulose, hydroxyethyl cellulose and polyethylene glycol, said interior layer forming the major portion of the composite structure; an outer layer of photo-degradable polyethylene film; an inner layer of photo-degradable polyethylene film, both the inner and outer layers being about 0.001 inch in thickness; a gas-impermeable coating of polypropylene lining the inner polyethylene layer, said layer of polypropylene being about 0.005 inch in thickness; means for opening said container, said means adapted to strip away a band of outer polyethylene film, exposing the water soluble intermediate layer to the moisture of the environment which then dissolves while the outer and inner layers will degrade to a powder.
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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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |