US2751633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for removing dense from lighter material
Assignee: AB Dick Co
•
Filing: 1949-09-10
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Granted: 1956-06-26
•
Expires: 1969-09-10
Abstract
No abstract record available.
Inventors
- 👤 James D A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:54
CPC Classifications
D; D01; D01G; D01G25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A FIBER DRY FELTING OPERATION IN WHICH FIBERS ARE MOVED OVER A FORAMINOUS SURFACE THROUGH WHICH SOME FIBERS PASS TO BE DEPOSITED IN THE FORM OF A FELT, THE STEPS OF MOVING THE FIBROUS MATERIAL OVER AN EXIT OPENING, DIRECTING A COUNTERFLOW OF AIR THROUGH SAID EXIT OPENING FOR THE SELECTIVE REMOVAL OF THE HEAVIER MATERIAL THROUGH THE OPENING, COLLECTING SAID HEAVIER MATERIAL REMOVED THROUGH THE OPENING, REPEATEDLY AGITATING THE COLLECTED HEAVIER MATERIAL AFTER PASSING THROUGH THE OPENING TO SEPARATE THEREFROM INDIVIDUAL FIBERS AND DIRECTING SAID COUNTERFLOW OF AIR THROUGH THE COLLECTED HEAVIER MATERIAL TO CARRY OFF THE FIBERS SEPARATED THEREFROM
Claim 2
Dependent Claim
102 words
IN A FIBER DRY FELTING OPERATION IN WHICH FIBERS ARE MOVED OVER A FORAMINOUS SURFACE THROUGH WHICH SOME FIBERS PASS TO BE DEPOSITED IN THE FORM OF A FELT, THE STEPS OF MOVING THE FIBROUS MATERIAL OVER AN EXIT OPENING, DIRECTING A COUNTERFLOW OF AIR THROUGH SAID EXIT OPENING FOR THE SELECTIVE REMOVAL OF THE HEAVIER MATERIAL THROUGH THE OPENING, COLLECTING SAID HEAVIER MATERIAL REMOVED THROUGH THE OPENING, REPEATEDLY AGITATING THE COLLECTED HEAVIER MATERIAL AFTER PASSING THROUGH THE OPENING TO SEPARATE THEREFROM INDIVIDUAL FIBERS AND DIRECTING SAID COUNTERFLOW OF AIR THROUGH THE COLLECTED HEAVIER MATERIAL TO CARRY OFF THE FIBERS SEPARATED THEREFROM
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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) | 1959-06-26 | 1959-12-26 | 1960-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-26 | 1963-12-26 | 1964-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-26 | 1967-12-26 | 1968-06-26 | $7700.00 | Window Closed / Lapsed |