US3244407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding and mixing powdered filter aid
Assignee: PIAZZA ENGINEERING Corp
•
Filing: 1964-01-09
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Granted: 1966-04-05
•
Expires: 1984-01-09
Abstract
No abstract record available.
Inventors
- 👤 Allen R Obergfell
- 👤 Piazza Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:28
CPC Classifications
D; D06; D06F; D06F43/00; D06F43/08; D06F43/081; D06F43/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
APPARATUS FOR MIXING MEASURED AMOUNTS OF POWDERED FILTER AID WITH A FLUID COMPRISING, IN COMBINATION, A CHAMBER HAVING A FLUID INLET AND AN OUTLET, A RESERVOIR FOR POWDERED FILTER AID ARRANGED ABOVE SAID CHAMBER, A PASSAGEWAY CONNECTING SAID RESERVOIR WITH SAID CHAMBER, A FIRST PLATE BRIDGING SAID PASSAGEWAY, SAID PLATE HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED APERTURES THEREIN, A SECOND PLATE ARRANGED OVER AND IN FACE TO FACE CONTACT WITH SAID APERTURED PLATE, SAID SECOND PLATE HAVING RADIAL ARMS RESPONDING IN NUMBER TO THE NUMBER OF APERTURES IN THE FIRST PLATE, MEANS TO ROTATE THE SECOND PLATE TO LOCATE THE ARMS IN PREDETERMINED RELATION TO THE APERTURES TO VARY THE EFFECTIVE SIZE OF SAID APERTURES, AND AN IMPELLER ARRANGED ABOVE SAID PLATES OPERABLE TO DELIVER FILTER AID TO SAID APERTURES FOR DISCHARGE THERETHROUGH.
Claim 2
Dependent Claim
133 words
APPARATUS FOR MIXING MEASURED AMOUNTS OF POWDERED FILTER AID WITH A FLUID COMPRISING, IN COMBINATION, A CHAMBER HAVING A FLUID INLET AND AN OUTLET, A RESERVOIR FOR POWDERED FILTER AID ARRANGED ABOVE SAID CHAMBER, A PASSAGEWAY CONNECTING SAID RESERVOIR WITH SAID CHAMBER, A FIRST PLATE BRIDGING SAID PASSAGEWAY, SAID PLATE HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED APERTURES THEREIN, A SECOND PLATE ARRANGED OVER AND IN FACE TO FACE CONTACT WITH SAID APERTURED PLATE, SAID SECOND PLATE HAVING RADIAL ARMS RESPONDING IN NUMBER TO THE NUMBER OF APERTURES IN THE FIRST PLATE, MEANS TO ROTATE THE SECOND PLATE TO LOCATE THE ARMS IN PREDETERMINED RELATION TO THE APERTURES TO VARY THE EFFECTIVE SIZE OF SAID APERTURES, AND AN IMPELLER ARRANGED ABOVE SAID PLATES OPERABLE TO DELIVER FILTER AID TO SAID APERTURES FOR DISCHARGE THERETHROUGH.
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |