Patent EP0533433A1 successfully refreshed from Google Patents.
US3607124A
Expired / Lapsed
US
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Multistage mixing devices with time staggered inputs
Assignee: Individual
•
Filing: 1969-01-21
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Granted: 1971-09-21
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Expires: 1989-01-21
Abstract
Abstract A device for mixing multicomponent plastic materials prepared from fast-reacting prepolymers comprises at least two mixing chambers with stirring devices, the chambers communicating with each other for material to flow through the chambers in succession, components of the material and, if desired, additives being fed to the chambers through valves, of which those of the second chamber are operable with a delay relatively to those of the first chamber.
Inventors
- 👤 Richard Zippel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:34
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7466; B01; B01F; B01F27/00; B01F27/50; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/401; B29B7/405; B29B7/407; B29B7/44; B29B7/58; B29B7/60; B29B7/603; B29B7/7461; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3109; Y10T137/8593; Y10T137/86389; Y10T137/86445
Claims Analysis
Total Claims: 0
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |