US3833142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sealing plastic containers
Assignee: Wyeth Holdings LLC
•
Filing: 1972-09-08
•
Granted: 1974-09-03
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Expires: 1992-09-08
Abstract
Abstract A method of sealing plastic containers so as to prevent wall collapse thereof or bubble development in or around the contents thereof wherein a thin film of stretchable plastic is sealed over the mouth of the container and a breathable closure is fitted over said film and the resultant container per se, are disclosed.
Inventors
- 👤 H Owen
- 👤 C Deeley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:51
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/20; B65D51/00; B65D51/18; B65D51/20; B65D79/00; B65D79/005; B65D79/0087; B65D2251/00; B65D2251/0003; B65D2251/0006; B65D2251/0015; B65D2251/0068; B65D2251/0093
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
66 words
A method of preventing wall collapse of a plastic container or bubble development in or around contents packaged in such container which comprises sealing the neck of such a container with a 1-10 mil film of a plastic which is substantially vapor impermeable, flexible, deflects at at least 1 lb./in.2 pressure and stretches without rupturing as it deflects and placing a breathable closure over said seal.
Claim 2
Independent Claim
66 words
A method of preventing wall collapse of a plastic container or bubble development in or around contents packaged in such container which comprises sealing the neck of such a container with a 1-10 mil film of a plastic which is substantially vapor impermeable, flexible, deflects at at least 1 lb./in.2 pressure and stretches without rupturing as it deflects and placing a breathable closure over said seal.
Claim 3
Dependent Claim
34 words
A method according to claim 1 wherein said container is composed of a blend of (1) a terpolymer of methyl methacrylate, styrene and acrylonitrile and (2) polybutadiene grafted with methyl methacrylate, styrene and acrylonitrile.
Claim 4
Dependent Claim
15 words
A method according to claim 1 wherein said film is heat sealed to said container.
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein said film is adhesion sealed to said container.
Claim 6
Dependent Claim
15 words
A method according to claim 1 wherein said film is a polymer or vinyl chloride.
Claim 7
Dependent Claim
19 words
A method according to claim 1 wherein said film is polyvinylidene chloride having polyethylene coated on each side thereof.
Claim 8
Dependent Claim
43 words
A plastic container having a neck sealed with a 1-10 mil film of a plastic which is flexible, deflects at at least 1 lb./in.2 pressure, is substantially vapor impermeable and stretches without rupturing as it deflects and a breathable closure over said seal.
Claim 9
Dependent Claim
43 words
A plastic container having a neck sealed with a 1-10 mil film of a plastic which is flexible, deflects at at least 1 lb./in.2 pressure, is substantially vapor impermeable and stretches without rupturing as it deflects and a breathable closure over said seal.
Claim 10
Dependent Claim
34 words
A container according to claim 7 wherein said container is produced from a blend of (1) a terpolymer of methyl methacrylate, styrene and acrylonitrile and (2) polybutadiene grafted with methyl methacrylate, styrene and acrylonitrile.
Claim 11
Dependent Claim
15 words
A container according to claim 7 wherein said film is a polymer of vinyl chloride.
Claim 12
Dependent Claim
19 words
A container according to claim 7 wherein said film is polyvinylidene chloride having polyethylene coated on each side thereof.
References Cited (Backward Citations)
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |