US4042543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material for stoppers
Assignee: Individual
•
Filing: 1976-02-13
•
Granted: 1977-08-16
•
Expires: 1996-02-13
Abstract
Abstract A material containing from 0.1 to 10 parts of polyethylene or ethylene vinyl acetate copolymer per 1 part of natural cork is provided as a substitute for natural cork in stoppers for liquid food or wine bottles.
Inventors
- 👤 Robert L. Strickman
- 👤 Melvyn B. Strickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:38
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/06; C08L97/00; C08L97/007
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
A composition for forming stoppers for bottles, containing 1 part by weight of natural cork particles and from about 0.1 to 10 parts by weight of a polymer powder composed of particles of a polymer selected from a group consisting of polyethylene, ethylene-vinyl acetate copolymer, and a mixture of the polyethylene and the ethylene-vinyl acetate copolymer, the particles of the natural cork ranging in size from about 0.2 to 10 mm.
Claim 2
Dependent Claim
71 words
A composition for forming stoppers for bottles, containing 1 part by weight of natural cork particles and from about 0.1 to 10 parts by weight of a polymer powder composed of particles of a polymer selected from a group consisting of polyethylene, ethylene-vinyl acetate copolymer, and a mixture of the polyethylene and the ethylene-vinyl acetate copolymer, the particles of the natural cork ranging in size from about 0.2 to 10 mm.
Claim 3
Dependent Claim
22 words
A composition according to claim 1 wherein the particles of the natural cork range in size from about 2.0 to 4.0 mm.
Claim 4
Dependent Claim
44 words
A composition according to claim 2 wherein the particles of the polymer powder range in size from about 8 to 30 microns with about 1 to 5 parts by weight of the polymer powder being to 1 part by weight of natural cork particles.
Claim 5
Dependent Claim
11 words
A composition according to claim 3 wherein the polymer is polyethylene.
Claim 6
Dependent Claim
27 words
A composition according to claim 4 which contains 1 part by weight of the natural cork particles and about 2.5 parts be weight of the polymer powder.
Claim 7
Dependent Claim
26 words
A composition according to claim 4 which contains 2 parts by weight of the polymer powder and 1 part by weight of the natural cork particles.
Claim 8
Dependent Claim
62 words
A process for the preparation of a composition according to claim 2 which comprises mixing the natural cork particles with the polymer powder until the natural cork particles are substantially uniformly coated with the polymer powder and filling the spaces between the particles be adding polymer powder, natural cork particles or a mixture of the polymer powder and the natural cork particles.
Claim 9
Dependent Claim
15 words
A composition for forming stoppers for bottles, prepared according to the process of claim 7.
Claim 10
Dependent Claim
62 words
A process for forming stoppers for bottles, which comprises subjecting a composition according to claim 1 to a pressure of about 5 to 75 pounds per square inch at a temperature of about 250° to 300° C for about one half hour, cooling and removing from the mold. to 300° C for about one half hour, cooling and removing from the mold.
Claim 11
Dependent Claim
17 words
A process according to claim 9 wherein the material is heated after being placed into the mold.
Claim 12
Dependent Claim
18 words
A process according to claim 9 wherein the material is heated prior to being placed in the mold.
Claim 13
Dependent Claim
11 words
Stoppers for bottles prepared by a process according to claim 9.
Claim 14
Dependent Claim
12 words
Stoppers for bottles when prepared by a process according to claim 10.
Claim 15
Dependent Claim
10 words
Stoppers for bottles, having a composition according to claim 1.
Claim 16
Dependent Claim
10 words
Stoppers for bottles, having a composition according to claim 5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |