US3582045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer intermingler
Assignee: Monsanto Co
•
Filing: 1969-04-03
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Granted: 1971-06-01
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Expires: 1989-04-03
Abstract
Abstract An apparatus for improving the homogeneity of molten heat sensitive polymers when the flow thereof is substantially laminar. The apparatus has a tubular housing into which is snugly fitted a first helical member, and into which is disposed a second helical member of such size as to fit inside the first helical member.
Inventors
- 👤 Allen E Leybourne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:42
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/431; B01F25/4314
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |