Patent US3006087A successfully refreshed from Google Patents.
US3371783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal air classifiers
Assignee: GEOFFREY DANIEL HUMPHREYS
•
Filing: 1965-12-08
•
Granted: 1968-03-05
•
Expires: 1985-12-08
Abstract
No abstract record available.
Inventors
- 👤 Meyer Paul
- 👤 Humphreys Geoffrey Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:08
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/08; B07B7/083; B07B4/00; B07B4/02; B07B4/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A ROTARY AIR CLASSIFIER INCLUDING A CASING PROVIDED WITH AN INLET FOR MATERIAL TO BE CLASSIFIED AND A DISCHARGE OUTLET FOR CLASSIFIED PARTICLES, AND A ROTOR MOUNTED TO REVOLVE ABOUT A VERTIVAL AXIS WITHIN THE CASING, SAID ROTOR COMPRISING A TOP PLATE AND A BOTTOM SHROUD PLATE, THE CLASSIFYING ZONE DEFINED BETWEEN SAID PLATES BEING SUBDIVIDED BY RADIAL BLADES, SAID ROTOR HAVING A CENTRAL ORIFICE FOR DISCHARGE OF FLUID AND FINES, SAID ZONE BEING OPEN AT ITS PERIMETER FOR ADMISSION OF CARRIER FLUID FROM THE
Claim 2
Dependent Claim
85 words
A ROTARY AIR CLASSIFIER INCLUDING A CASING PROVIDED WITH AN INLET FOR MATERIAL TO BE CLASSIFIED AND A DISCHARGE OUTLET FOR CLASSIFIED PARTICLES, AND A ROTOR MOUNTED TO REVOLVE ABOUT A VERTIVAL AXIS WITHIN THE CASING, SAID ROTOR COMPRISING A TOP PLATE AND A BOTTOM SHROUD PLATE, THE CLASSIFYING ZONE DEFINED BETWEEN SAID PLATES BEING SUBDIVIDED BY RADIAL BLADES, SAID ROTOR HAVING A CENTRAL ORIFICE FOR DISCHARGE OF FLUID AND FINES, SAID ZONE BEING OPEN AT ITS PERIMETER FOR ADMISSION OF CARRIER FLUID FROM THE
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |