US3608005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating the flanges of containers
Assignee: Monsanto Co
•
Filing: 1968-12-10
•
Granted: 1971-09-21
•
Expires: 1988-12-10
Abstract
Abstract Containers of synthetic plastic material having an outwardly extending flange about at least a portion of their periphery have applied to the outer edge of the flange an organic compound which penetrates into the synthetic plastic material and which is caused to effect the synthetic plastic material so as to eliminate projecting portions for a smooth edge surface. Solvents and foaming agents may be used.
Inventors
- 👤 Cecil P Fortner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:30
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/02; B29C45/00; B29C45/0053; B29C2045/0077
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
46 words
The method in accordance with Claim 1 wherein said organic fluid is a solvent for the synthetic plastic material and is caused to affect the synthetic plastic by allowing it to soften the material to eliminate substantially said edge defects and provide a relatively smooth surface.
Claim 2
Dependent Claim
22 words
The method in accOrdance with claim 2 wherein said synthetic plastic material is biaxially oriented and the solvent produces localized disorientation thereof.
Claim 3
Dependent Claim
16 words
The method in accordance with claim 3 wherein said synthetic plastic material is biaxially oriented polystyrene.
Claim 4
Dependent Claim
48 words
The method in accordance with claim 1 wherein the organic fluid is a pneumatogen and wherein the fluid is caused to affect the material by heating the treated flange portion after penetration of the fluid thereinto to produce foaming of at least the surface of the treated portion.
Claim 5
Dependent Claim
19 words
The method in accordance with claim 5 wherein said synthetic plastic is an impact modified biaxially oriented styrene polymer.
Claim 6
Dependent Claim
29 words
The method in accordance with claim 1 wherein said containers are of generally rectangular cross section and wherein organic fluid is applied concurrently to flanges along opposite sides thereof.
Claim 7
Dependent Claim
22 words
The method in accordance with claim 7 wherein similar steps are subsequently conducted with respect to the remaining sides of the container.
Claim 8
Dependent Claim
32 words
The method in accordance with claim 1 wherein the amount of organic fluid applied to said flanges is limited to provide contact thereof with a portion of the surface of the flanges.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |