US3262686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for expanding plastic material
Assignee: Individual
•
Filing: 1963-08-09
•
Granted: 1966-07-26
•
Expires: 1983-08-09
Abstract
No abstract record available.
Inventors
- 👤 Robert A Kraus
- 👤 Edmund J Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:47
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3461
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A DEVICE FOR EXPANDING A PLURALITY OF HEAT-EXPANDIBLE FOAM PLASTIC PELLETS COMPRISING A CHAMBER SAID CHAMBER HAVING A SUBSTANTIALLY FLAT HORIZONTAL BOTTOM WALL, AND A WALL PORTION ADJACENT SAID BOTTOM WALL, INLET MEANS FOR SAID CHAMBER FOR SUBSTANTIALLY CONTINUOUSLY INTRODUCING UNEXPANDED PELLETS INTO SAID CHAMBER, AN AGITATOR IN SAID CHAMBER FOR MIXING PELLETS SO INTRODUCED, SAID AGITATOR INCLUDING AN ELONGATED MEMBER HAVING AN EDGE CLOSELY SPACED FROM SAID BOTTOM WALL AND ROTATABLE ABOUT SAID BOTTOM WALL, AN OUTLET FROM SAID CHAMBER FOR REMOVING EXPANDED PELLETS THEREFROM, AND A SOURCE OF DRY HEAT FOR RAISING THE TEMPERATURE OF SAID PELLETS IN SAID CHAMBER TO CAUSE EXPANSION THEREOF, SAID SOURCE OF DRY HEAT INCLUDING MEANS FOR HEATING SAID WALL PORTION OF SAID CHAMBER ADJACENT SAID BOTTOM WALL, AND FOR MAINTAINING SAID WALL PORTION AT A TEMPERATURE ABOVE THE TEMPERATURE OF SAID BOTTOM WALL.
Claim 2
Independent Claim
141 words
A DEVICE FOR EXPANDING A PLURALITY OF HEAT-EXPANDIBLE FOAM PLASTIC PELLETS COMPRISING A CHAMBER SAID CHAMBER HAVING A SUBSTANTIALLY FLAT HORIZONTAL BOTTOM WALL, AND A WALL PORTION ADJACENT SAID BOTTOM WALL, INLET MEANS FOR SAID CHAMBER FOR SUBSTANTIALLY CONTINUOUSLY INTRODUCING UNEXPANDED PELLETS INTO SAID CHAMBER, AN AGITATOR IN SAID CHAMBER FOR MIXING PELLETS SO INTRODUCED, SAID AGITATOR INCLUDING AN ELONGATED MEMBER HAVING AN EDGE CLOSELY SPACED FROM SAID BOTTOM WALL AND ROTATABLE ABOUT SAID BOTTOM WALL, AN OUTLET FROM SAID CHAMBER FOR REMOVING EXPANDED PELLETS THEREFROM, AND A SOURCE OF DRY HEAT FOR RAISING THE TEMPERATURE OF SAID PELLETS IN SAID CHAMBER TO CAUSE EXPANSION THEREOF, SAID SOURCE OF DRY HEAT INCLUDING MEANS FOR HEATING SAID WALL PORTION OF SAID CHAMBER ADJACENT SAID BOTTOM WALL, AND FOR MAINTAINING SAID WALL PORTION AT A TEMPERATURE ABOVE THE TEMPERATURE OF SAID BOTTOM WALL.
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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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |