US3278658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for making shaped cellular articles from expandable thermoplastic resins
Assignee: Atlantic Richfield Co
•
Filing: 1963-12-05
•
Granted: 1966-10-11
•
Expires: 1983-12-05
Abstract
No abstract record available.
Inventors
- 👤 Richard H Immel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:14
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C33/00; B29C33/10; B29C33/38; B29C33/3814; B29C44/3415; B29C44/3426
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF FORMING A SHAPED FOAMED CELLULAR THERMOPLASTIC ARTICLE COMPRISING FORMING AN ENTRAINMENT OF GRANULES OF AN EXPANDABLE THERMOPLASTIC MATERIAL IN A SUBSTANTIALLY DRY HEATED GASEOUS MEDIUM, FLOWING SAID ENTRAINMENT INTO A SPACED THAT DEFINES THE SHAPE OF SAID ARTICLE WHILE HEATING SAID GRANULES TO A TEMPERATURE ABOVE THE SOFTENING POINT OF THE THERMOPLASTIC MATERIAL BUT BELOW THE TEMPERATURE WHERE SUBSTANTIAL EXPANSION TAKES PLACE AS THE GRANULES FLOW TO SAID SPACE, THEREAFTER SUBJECTING SAID GRANULES IN SAID SPACE TO A VACUUM SO THAT SAID GRANULES EXPAND AND FUSE TOGETHER TO FORM A CELLULAR PLASTIC ARTICLE CONFORMING TO SAID SPACE, AND THEN REMOVING THE ARTICLE FROM SAID SPACE.
Claim 2
Independent Claim
108 words
A METHOD OF FORMING A SHAPED FOAMED CELLULAR THERMOPLASTIC ARTICLE COMPRISING FORMING AN ENTRAINMENT OF GRANULES OF AN EXPANDABLE THERMOPLASTIC MATERIAL IN A SUBSTANTIALLY DRY HEATED GASEOUS MEDIUM, FLOWING SAID ENTRAINMENT INTO A SPACED THAT DEFINES THE SHAPE OF SAID ARTICLE WHILE HEATING SAID GRANULES TO A TEMPERATURE ABOVE THE SOFTENING POINT OF THE THERMOPLASTIC MATERIAL BUT BELOW THE TEMPERATURE WHERE SUBSTANTIAL EXPANSION TAKES PLACE AS THE GRANULES FLOW TO SAID SPACE, THEREAFTER SUBJECTING SAID GRANULES IN SAID SPACE TO A VACUUM SO THAT SAID GRANULES EXPAND AND FUSE TOGETHER TO FORM A CELLULAR PLASTIC ARTICLE CONFORMING TO SAID SPACE, AND THEN REMOVING THE ARTICLE FROM SAID SPACE.
References Cited (Backward Citations)
US3065500A
Cited
US3086248A
Cited
US3139466A
Cited
US3167811A
Cited
US3015851A
Cited
US3202734A
Cited
US3162704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |