Patent US3152202A successfully refreshed from Google Patents.
US3152202A
Expired / Lapsed
US
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Manufacture of tapered end plastic tubes
Assignee: Dade Reagents Inc
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Filing: 1960-12-30
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Granted: 1964-10-06
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Expires: 1980-12-30
Abstract
No abstract record available.
Inventors
- 👤 Jr William P Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:50
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/03; B29C48/09; B29C48/13; B29C48/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN THE PRODUCTION OF PLASTIC TUBES HAVING REDUCED END PORTIONS, THE STEPS OF CONTINUOUSLY EXTRUDING A PLASTIC TUBE THROUGH AN EXTRUSION ORIFICE, DRAWING THE EXTRUDED TUBE AT A SUBSTANTIALLY UNIFORM RATE FROM SAID ORIFICE, AND PERIODICALLY AND UNIFORMLY REDUCING THE AMOUNT OF PLASTIC MATERIAL PASSING THROUGH SAID ORIFICE ABOUT THE ENTIRE PERPHERY THEREOF TO FORM EVENLY SPACED TUBULAR PORTIONS OF REDUCED DIAMETER.
Claim 2
Dependent Claim
62 words
IN THE PRODUCTION OF PLASTIC TUBES HAVING REDUCED END PORTIONS, THE STEPS OF CONTINUOUSLY EXTRUDING A PLASTIC TUBE THROUGH AN EXTRUSION ORIFICE, DRAWING THE EXTRUDED TUBE AT A SUBSTANTIALLY UNIFORM RATE FROM SAID ORIFICE, AND PERIODICALLY AND UNIFORMLY REDUCING THE AMOUNT OF PLASTIC MATERIAL PASSING THROUGH SAID ORIFICE ABOUT THE ENTIRE PERPHERY THEREOF TO FORM EVENLY SPACED TUBULAR PORTIONS OF REDUCED DIAMETER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |