US3767754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for melting and dispersion of thermoplastic polymers
Assignee: Honeywell International Inc
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Filing: 1971-03-08
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Granted: 1973-10-23
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Expires: 1991-03-08
Abstract
Abstract AN IMPROVED METHOD FOR UNIFORMLY MIXING POLYMER MATERIALS AND ADDITIVES WHEREIN ONE CONSTITUENT MAY BE A LOW VISCOSITY COMPONENT AND THE OTHER A VISCOUS POLYMER MIXED BY PASSAGE THROUGH AN EXTRUDER HAVING THE OVERALL LENGTH COMPRISED OF A FEED ZONE 10-20 PERCENT; A TRANSISTION ZONE 27-40 PERCENT AND A METERING ZONE OF 45-60 PERCENT. WITHIN SAID METERING ZONE THERE ARE 2-6 FLIGHT INTERRUPTIONS, SAID METHOD OF MIXING POLYMERS PRODUCING AN EXTRUDATE WITH A COEFFICIENT OF PARTICLE VARIATION OF LESS THAN 30 PERCENT AND SAID POLYBLENDS AND LOW VISCOSITY MATERIALS INCORPORATED IN POLYMERS BEING BOTH SUITABLE FOR PIECE DYEING WHEN CONVERTED INTO TEXTILE ARTICLES.
Inventors
- 👤 D Manning
- 👤 L Caison
- 👤 F Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:43
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/80; B29C48/84; B29C48/85; B29C48/36; B29C48/395; B29C48/50; B29C48/505; B29C48/565; B29C48/67; B29C48/82; B29C48/83; B29C48/832; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |