Patent US3257103A successfully refreshed from Google Patents.
US3257103A
Expired / Lapsed
US
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Apparatus for processing expandable plastic material
Assignee: Individual
•
Filing: 1962-07-06
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Granted: 1966-06-21
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Expires: 1982-07-06
Abstract
No abstract record available.
Inventors
- 👤 Frederick B Brockhues
- 👤 Muhm Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:58
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3461; Y; Y10; Y10S; Y10S264/00; Y10S264/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
AN APPARATUS FOR PROCESSING EXPANDABLE BEADS OF PLASTIC MATERIAL, COMPRISING AN INNER CONTAINER FOR BEADS, ALL OF ITS WALLS BEING STEAM-PERMEABLE SIEVE ELEMENTS HAVING CLOSELY SPACED CONTINUOUS SLOTS ACROSS THE ENTIRE SURFACE OF SAID SIEVE ELEMENTS, AN EXTERIOR WALL SURROUNDING THE INNER CONTAINER AND DEFINING A SPACE THEREWITH, AN INLET FOR SUPPLYING STEAM UNDER PRESSURE TO SAID SPACE AND THROUGH THE STEAM PERMEABLE WALLS OF THE INNER CONTAINER INTO THE INTERIOR OF THE CONTAINER, AND AN OUTLET MEANS PERMITTING FLUID TO ESCAPE FROM SAID SPACE.
Claim 2
Independent Claim
85 words
AN APPARATUS FOR PROCESSING EXPANDABLE BEADS OF PLASTIC MATERIAL, COMPRISING AN INNER CONTAINER FOR BEADS, ALL OF ITS WALLS BEING STEAM-PERMEABLE SIEVE ELEMENTS HAVING CLOSELY SPACED CONTINUOUS SLOTS ACROSS THE ENTIRE SURFACE OF SAID SIEVE ELEMENTS, AN EXTERIOR WALL SURROUNDING THE INNER CONTAINER AND DEFINING A SPACE THEREWITH, AN INLET FOR SUPPLYING STEAM UNDER PRESSURE TO SAID SPACE AND THROUGH THE STEAM PERMEABLE WALLS OF THE INNER CONTAINER INTO THE INTERIOR OF THE CONTAINER, AND AN OUTLET MEANS PERMITTING FLUID TO ESCAPE FROM SAID SPACE.
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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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |