Patent US577452A successfully refreshed from Google Patents.
US3003193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making beads of thermoplastic polymers
Assignee: Dow Chemical Co
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Filing: 1959-01-15
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Granted: 1961-10-10
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Expires: 1979-01-15
Abstract
No abstract record available.
Inventors
- 👤 Douglas S Chisholm
- 👤 Harold R Bylsma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:06
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/461; B01; B01J; B01J2/00; B01J2/20; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/065; B29C44/50; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A METHOD FOR MAKING MOLDING GRANULES IN THE FORM OF BEADS FROM A SYNTHETIC THERMOPLASTIC RESIN WHICH COMPRISES INTERMITTENTLY EXTRUDING A HEAT-PLASTIFIED NORMALLY SOLID RESINOUS COMPOSITION COMPRISING A SYNTHETIC THERMOPLASTIC POLYMER UNDER A CONTINUOUSLY APPLIED PRESSURE THROUGH A PLURALITY OF CONSTRICTED PASSAGEWAYS AND A FIRST VALVING MEANS INTO A PLURALITY OF OPEN OUTLETS IN A ZONE OF LOWER PRESSURE AS DISCRETE GLOBULES OF SAID RESINOUS COMPOSITION AND ALTERNATELY FLOWING A NON-REACTING FLUID WHICH IS IMMISCIBLE WITH THE PLASTIC GLOBULES UNDER A CONTINUOUSLY APPLIED PRESSURE AND AT A TEMPERATURE ABOVE ITS BOILING POINT AT ATMOSPHERIC PRESSURE INTO SAID OUTLETS THROUGH CHANNELS OPENING IN REGISTER WITH SAID OUTLETS THROUGH A SECOND VALVING MEANS NON-CONNECTING WITH SAID CONSTRICTED PASSAGEWAYS, WHEREBY THE GLOBULES OF THE EXTRUDED PLASTIC COMPOSITION ARE EJECTED FROM SAID OUTLETS AND COOLED TO DISCRETE SOLID BEADS.
Claim 2
Independent Claim
135 words
A METHOD FOR MAKING MOLDING GRANULES IN THE FORM OF BEADS FROM A SYNTHETIC THERMOPLASTIC RESIN WHICH COMPRISES INTERMITTENTLY EXTRUDING A HEAT-PLASTIFIED NORMALLY SOLID RESINOUS COMPOSITION COMPRISING A SYNTHETIC THERMOPLASTIC POLYMER UNDER A CONTINUOUSLY APPLIED PRESSURE THROUGH A PLURALITY OF CONSTRICTED PASSAGEWAYS AND A FIRST VALVING MEANS INTO A PLURALITY OF OPEN OUTLETS IN A ZONE OF LOWER PRESSURE AS DISCRETE GLOBULES OF SAID RESINOUS COMPOSITION AND ALTERNATELY FLOWING A NON-REACTING FLUID WHICH IS IMMISCIBLE WITH THE PLASTIC GLOBULES UNDER A CONTINUOUSLY APPLIED PRESSURE AND AT A TEMPERATURE ABOVE ITS BOILING POINT AT ATMOSPHERIC PRESSURE INTO SAID OUTLETS THROUGH CHANNELS OPENING IN REGISTER WITH SAID OUTLETS THROUGH A SECOND VALVING MEANS NON-CONNECTING WITH SAID CONSTRICTED PASSAGEWAYS, WHEREBY THE GLOBULES OF THE EXTRUDED PLASTIC COMPOSITION ARE EJECTED FROM SAID OUTLETS AND COOLED TO DISCRETE SOLID BEADS.
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) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |