US3374296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic extrusion process
Assignee: Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Filing: 1964-01-22
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Granted: 1968-03-19
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Expires: 1984-01-22
Abstract
No abstract record available.
Inventors
- 👤 Hermann R K Janeschitz-Kriegl
- 👤 Schijf Johannes
- 👤 Johannes A M Telgenkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:42
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92209; B29C2948/92323; B29C2948/92361; B29C2948/9238; B29C2948/92504; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR CONTROLLING THE HEAT SUPPLY TO THE MELTING ZONE OF A THERMOPLASTIC SYNTHETIC RESIN SCREW EXTRUDER COMPRISING (A) MEASURING THE DIFFERENCE IN TEMPERATURE BETWEEN TWO SEPARATELY LOCATED SENSING DEVICES AT BOTH ENDS OF A METERING ZONE; (B) MAINTAINING THE OUTER CYLINDER WALL OF THE METERING ZONE OF SAID SCREW EXTRUDER AT A CONSTANT TEMPERATURE: AND (C) SUPPLYING HEAT TO THE MELTING ZONE OF SAID EXTRUDER IN RESPONSE TO A CHANGE IN THE DIFFERENCE IN TEMPERATURE BETWEEN SAID SENSING DEVICES.
Claim 2
Dependent Claim
81 words
A PROCESS FOR CONTROLLING THE HEAT SUPPLY TO THE MELTING ZONE OF A THERMOPLASTIC SYNTHETIC RESIN SCREW EXTRUDER COMPRISING (A) MEASURING THE DIFFERENCE IN TEMPERATURE BETWEEN TWO SEPARATELY LOCATED SENSING DEVICES AT BOTH ENDS OF A METERING ZONE; (B) MAINTAINING THE OUTER CYLINDER WALL OF THE METERING ZONE OF SAID SCREW EXTRUDER AT A CONSTANT TEMPERATURE: AND (C) SUPPLYING HEAT TO THE MELTING ZONE OF SAID EXTRUDER IN RESPONSE TO A CHANGE IN THE DIFFERENCE IN TEMPERATURE BETWEEN SAID SENSING DEVICES.
References Cited (Backward Citations)
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US2789313A
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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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |