Patent US3340573A successfully refreshed from Google Patents.
US3340573A
Expired / Lapsed
US
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Method and apparatus for producing planar objects from plastics
Assignee: Individual
•
Filing: 1964-01-17
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Granted: 1967-09-12
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Expires: 1984-01-17
Abstract
No abstract record available.
Inventors
- 👤 Sommerfeld Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:05
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN APPARATUS FOR MANUFACTURING PLANAR PRODUCTS FROM A STREAM OF PLASTIC MATERIAL COMPRISING AN INLET CHANNEL FOR RECEIVING SAID STREAM OF PLASTIC MATERIAL; A FIRST CHAMBER HAVING AN ARC SHAPED BOTTOM, COPLANAR WALLS AND A LINEAR TOP CONNECTED WITH SAID INLET CHANNEL; A SECOND CHAMBER HAVING SUBSTANTIALLY THE SAME CONFIGURATION AS SAID FIRST CHAMBER AND BEING ARRANGED IN SPACED RELATIONSHIP WITH THE LATTER; AN OVERFLOW CHANNEL HAVING AN ARC-SHAPED CROSS-SECTION AND CONNECTING CIRCUMFERENTIALLY SAID FIRST AND SECOND CHAMBER TO OVERFLOW SAID PLASTIC MATERIAL FROM ONE CHAMBER TO ANOTHER, AN OUTLET EXTRUSION CHANNEL HAVING A LINEAR WIDE SLOT CROSS-SECTION AND BEING CONNECTED TO THE LINEAR TOP OF SAID SECOND CHAMBER.
Claim 2
Independent Claim
109 words
AN APPARATUS FOR MANUFACTURING PLANAR PRODUCTS FROM A STREAM OF PLASTIC MATERIAL COMPRISING AN INLET CHANNEL FOR RECEIVING SAID STREAM OF PLASTIC MATERIAL; A FIRST CHAMBER HAVING AN ARC SHAPED BOTTOM, COPLANAR WALLS AND A LINEAR TOP CONNECTED WITH SAID INLET CHANNEL; A SECOND CHAMBER HAVING SUBSTANTIALLY THE SAME CONFIGURATION AS SAID FIRST CHAMBER AND BEING ARRANGED IN SPACED RELATIONSHIP WITH THE LATTER; AN OVERFLOW CHANNEL HAVING AN ARC-SHAPED CROSS-SECTION AND CONNECTING CIRCUMFERENTIALLY SAID FIRST AND SECOND CHAMBER TO OVERFLOW SAID PLASTIC MATERIAL FROM ONE CHAMBER TO ANOTHER, AN OUTLET EXTRUSION CHANNEL HAVING A LINEAR WIDE SLOT CROSS-SECTION AND BEING CONNECTED TO THE LINEAR TOP OF SAID SECOND CHAMBER.
References Cited (Backward Citations)
US2734224A
Cited
US2090404A
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US3065502A
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US3145419A
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US3197815A
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US3255488A
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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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |