US3249660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming containers from expandable plastic materials
Assignee: OI Glass Inc
•
Filing: 1963-03-01
•
Granted: 1966-05-03
•
Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 King Robert William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:11
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/42; B29C44/421; Y; Y10; Y10S; Y10S264/00; Y10S264/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
METHOD OF INJECTION MOLDING A HOLLOW CONTAINER FROM EXPANDABLE PLASTIC MATERIALS COMPRISING EXTRUDING AN EXPANDABLE PLASTIC INTO A FIRST CHAMBER, APPLYING MECHANICAL PRESSURE BY THE COOPERATUVE ACTION OF TWO MOVABLE MEMBERS ONE WITHIN SAID FIRST CHAMBER AND ONE WITHOUS SAID CHAMBER ON SAID LPLASTIC TO PREVENT ITS EXPANSION THEREAFTER TRANSFERRING SAID PLASTIC WHILE MAINTAINING THE PLASTIC UNDER SUCH PRESSURE AS TO PREVENT EXPANSION THEREOF BY MEANS OF SAID PISTONS TO A MOLD CAVITY
Claim 2
Dependent Claim
73 words
METHOD OF INJECTION MOLDING A HOLLOW CONTAINER FROM EXPANDABLE PLASTIC MATERIALS COMPRISING EXTRUDING AN EXPANDABLE PLASTIC INTO A FIRST CHAMBER, APPLYING MECHANICAL PRESSURE BY THE COOPERATUVE ACTION OF TWO MOVABLE MEMBERS ONE WITHIN SAID FIRST CHAMBER AND ONE WITHOUS SAID CHAMBER ON SAID LPLASTIC TO PREVENT ITS EXPANSION THEREAFTER TRANSFERRING SAID PLASTIC WHILE MAINTAINING THE PLASTIC UNDER SUCH PRESSURE AS TO PREVENT EXPANSION THEREOF BY MEANS OF SAID PISTONS TO A MOLD CAVITY
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |