Patent US3308222A successfully refreshed from Google Patents.
US3308222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet extrusion die
Assignee: Somerset Technologies Inc
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Filing: 1964-08-19
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Granted: 1967-03-07
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Expires: 1984-08-19
Abstract
No abstract record available.
Inventors
- 👤 Kovacs Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:00
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/695; B29C48/70; B29C48/03; B29C48/07; B29C48/08; B29C48/30; B29C48/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD FOR EQUALIZING EXTRUDING PRESSURE OF A THERMOPLASTIC MATERIAL ISSUING IN SHEET FORM FROM AN EXTRUDING DIE COMPRISING, ADMITTING SAID MATERIAL INTO SAID DIE AT ABOUT THE MIDPOINT OF AN ELONGATED CHAMBER, SPLITTING THE FLOW THEREFROM INTO OPPOSING ENDS OF EACH OF AT LEAST TWO SEPARATE GENERALLY COEXTENSIVE CHAMBERS, EXHAUSTING SAID MATERIAL FROM EACH OF SAID CHAMBERS THROUGH GENERALLY COEXTENSIVE SIDE OUTLET PASSAGES, COMBINING THE FLOWS FROM SAID PASSAGES AND EXTRUDING THE COMBINED FLOWS AS ONE.
Claim 2
Independent Claim
77 words
THE METHOD FOR EQUALIZING EXTRUDING PRESSURE OF A THERMOPLASTIC MATERIAL ISSUING IN SHEET FORM FROM AN EXTRUDING DIE COMPRISING, ADMITTING SAID MATERIAL INTO SAID DIE AT ABOUT THE MIDPOINT OF AN ELONGATED CHAMBER, SPLITTING THE FLOW THEREFROM INTO OPPOSING ENDS OF EACH OF AT LEAST TWO SEPARATE GENERALLY COEXTENSIVE CHAMBERS, EXHAUSTING SAID MATERIAL FROM EACH OF SAID CHAMBERS THROUGH GENERALLY COEXTENSIVE SIDE OUTLET PASSAGES, COMBINING THE FLOWS FROM SAID PASSAGES AND EXTRUDING THE COMBINED FLOWS AS ONE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |