US3144493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming partly foamed plastic articles
Assignee: OI Glass Inc
•
Filing: 1959-10-19
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Granted: 1964-08-11
•
Expires: 1979-10-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Santelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:09
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/04; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C2949/00; B29C2949/30; B29C2949/3032; B29C2949/3041; B29C48/03; B29C48/09; B29C48/36; B29C48/475; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258; B29L; B29L2031/00; B29L2031/712; B29L2031/7158; Y; Y10; Y10S; Y10S264/00; Y10S264/01; Y10S264/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A METHOD WHICH COMPRISES THE STEPS OF (1) PROVIDING A SINGLE, UNDIVIDED QUANTITY OF HOT PLASTICIZED PLASTIC MATERIAL CONTAINING AN INTIMATELY DISPERSED FOAMING OR CELLULATING AGENT, (2) FORMING A SUBSTANTIALLY UNEXPANDED, NON-CELLULAR SHPAED END PORTION OF AN ARTICLE FROM A FIRST PORTION OF SAID UNDIVIDED QUANTITY OF PLASTIC MATERIAL UNDER TEMPERATURE AND PRESSURE SHAPING CONDITIONS WHICH PREVENT ANY SUBSTANTIAL FOAMING OF SAID END PORTION BY SAID FOAMING AGENT AND CHILLING SAID END PORTION TO AN UNPLASTICIZED ESSENTIALLY RIGID CONDITION PREVENTING FOAMING EVEN AT A LOWER PRESSURE, (3) FROM A SECOND PORTION OF SAID UNDIVIDED QUANTITY OF PLASTIC MATERIAL FORMING THE BALACE OF SAID ARTICLE INTEGRAL WITH SAID SHAPED END PORTION AT A LOWER PRESSURE CONDITION AND A TEMPERATURE CONDITION WHEREIN SAID SECOND PORITON IS STILL PLASTICIZED, WHEREBY SAID SECOND PORTION OF SAID ARTICLE IS EXPANDED INTO A CELLULAR STRUCTURE BY THE ACTION OF SAID FOAMING AGENT, SAID SINGLE QUANTITY OF PLASTIC MATERIAL REMAINING UNDIVIDED AND UNSEPARATED THROUGHOUT SAID METHOD.
Claim 2
Independent Claim
159 words
A METHOD WHICH COMPRISES THE STEPS OF (1) PROVIDING A SINGLE, UNDIVIDED QUANTITY OF HOT PLASTICIZED PLASTIC MATERIAL CONTAINING AN INTIMATELY DISPERSED FOAMING OR CELLULATING AGENT, (2) FORMING A SUBSTANTIALLY UNEXPANDED, NON-CELLULAR SHPAED END PORTION OF AN ARTICLE FROM A FIRST PORTION OF SAID UNDIVIDED QUANTITY OF PLASTIC MATERIAL UNDER TEMPERATURE AND PRESSURE SHAPING CONDITIONS WHICH PREVENT ANY SUBSTANTIAL FOAMING OF SAID END PORTION BY SAID FOAMING AGENT AND CHILLING SAID END PORTION TO AN UNPLASTICIZED ESSENTIALLY RIGID CONDITION PREVENTING FOAMING EVEN AT A LOWER PRESSURE, (3) FROM A SECOND PORTION OF SAID UNDIVIDED QUANTITY OF PLASTIC MATERIAL FORMING THE BALACE OF SAID ARTICLE INTEGRAL WITH SAID SHAPED END PORTION AT A LOWER PRESSURE CONDITION AND A TEMPERATURE CONDITION WHEREIN SAID SECOND PORITON IS STILL PLASTICIZED, WHEREBY SAID SECOND PORTION OF SAID ARTICLE IS EXPANDED INTO A CELLULAR STRUCTURE BY THE ACTION OF SAID FOAMING AGENT, SAID SINGLE QUANTITY OF PLASTIC MATERIAL REMAINING UNDIVIDED AND UNSEPARATED THROUGHOUT SAID METHOD.
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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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |