US3302934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making porous materials
Assignee: Individual
•
Filing: 1965-06-04
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Granted: 1967-02-07
•
Expires: 1985-06-04
Abstract
No abstract record available.
Inventors
- 👤 William C Milligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:23
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/60; B01F27/72; B01F27/725
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN AERATING DEVICE FOR SLURRIES COMPRISING A FIRST SCREW CONVEYOR, MEANS FOR INTRODUCING A SLURRY INTO SAID SCREW CONVEYOR, PLENUM CHAMBER DEFINING MEANS DISPOSED COAXIALLY WITH SAID FIRST SCREW CONVEYOR, SAID MEANS INCLUDING A FLUID PERMEABLE WALL ADJOINING SAID FIRST SCREW CONVEYOR, MEANS FOR INTRODUCING A FOAM PRODUCING FLUID THROUGH SAID PERMEABLE WALL AND INTO THE SLURRY BEING CONVEYED BY SAID FIRST CONVEYOR MEANS, A SECOND CONVEYOR MEANS RECEIVING THE DISCHARGE FROM SAID FIRST SCREW CONVEYOR, AND MEANS FOR DRIVING SAID FIRST AND SECOND CONVEYOR MEANS AT DIFFERING SPEEDS.
Claim 2
Dependent Claim
89 words
AN AERATING DEVICE FOR SLURRIES COMPRISING A FIRST SCREW CONVEYOR, MEANS FOR INTRODUCING A SLURRY INTO SAID SCREW CONVEYOR, PLENUM CHAMBER DEFINING MEANS DISPOSED COAXIALLY WITH SAID FIRST SCREW CONVEYOR, SAID MEANS INCLUDING A FLUID PERMEABLE WALL ADJOINING SAID FIRST SCREW CONVEYOR, MEANS FOR INTRODUCING A FOAM PRODUCING FLUID THROUGH SAID PERMEABLE WALL AND INTO THE SLURRY BEING CONVEYED BY SAID FIRST CONVEYOR MEANS, A SECOND CONVEYOR MEANS RECEIVING THE DISCHARGE FROM SAID FIRST SCREW CONVEYOR, AND MEANS FOR DRIVING SAID FIRST AND SECOND CONVEYOR MEANS AT DIFFERING SPEEDS.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |