US3322869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for making multiwalled article
Assignee: Phillips Petroleum Co
•
Filing: 1963-07-11
•
Granted: 1967-05-30
•
Expires: 1983-07-11
Abstract
No abstract record available.
Inventors
- 👤 Jr John N Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:14
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/02; B29C49/04; B29C49/22; B29C49/24; B29C63/00; B29C63/18; B29C63/38; B29C63/42; Y; Y10; Y10S; Y10S264/00; Y10S264/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF FORMING MULTIWALLED PLASTIC CONTAINERS WHICH COMPRISES THE STEPS OF EXTRUDING A PARISON OF MOLTEN PLASTIC MATERIAL, CLOSING A MOLDING MEANS AROUND SAID PARISON, INJECTING A FLUID INTO SAID PARIOSN TO FORM THE CONTAINER, REMOVING THE CONTAINER FROM SAID MOLD, EXTRUDING A SECOND PARISON ABOUT SAID FORMED CONTAINER, CLOSING SAID SECOND PARISON AIRTIGHT ABOUT SAID CONTAINER, EVACUATING THE SPACE BETWEEN SAID PARISON AND CONTAINER TO CAUSE INTIMATE CONTACT AND FUSION BONDING THEREBETWEEN, AND COOLING SAID SECOND PARIOSN WHILE IN AIRTIGHT RELATIONSHIP WITH SAID FORMED CONTAINER TO CUSE SHRINKAGE OF SAID SECOND PARISON.
Claim 2
Independent Claim
94 words
A METHOD OF FORMING MULTIWALLED PLASTIC CONTAINERS WHICH COMPRISES THE STEPS OF EXTRUDING A PARISON OF MOLTEN PLASTIC MATERIAL, CLOSING A MOLDING MEANS AROUND SAID PARISON, INJECTING A FLUID INTO SAID PARIOSN TO FORM THE CONTAINER, REMOVING THE CONTAINER FROM SAID MOLD, EXTRUDING A SECOND PARISON ABOUT SAID FORMED CONTAINER, CLOSING SAID SECOND PARISON AIRTIGHT ABOUT SAID CONTAINER, EVACUATING THE SPACE BETWEEN SAID PARISON AND CONTAINER TO CAUSE INTIMATE CONTACT AND FUSION BONDING THEREBETWEEN, AND COOLING SAID SECOND PARIOSN WHILE IN AIRTIGHT RELATIONSHIP WITH SAID FORMED CONTAINER TO CUSE SHRINKAGE OF SAID SECOND PARISON.
References Cited (Backward Citations)
US3125619A
Cited
US2781551A
Cited
US2710987A
Cited
US2890483A
Cited
US3088166A
Cited
US2961214A
Cited
US3082484A
Cited
US3103036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |