Patent US3217447A successfully refreshed from Google Patents.
US3217447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrading device
Assignee: Individual
•
Filing: 1962-02-01
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Granted: 1965-11-16
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Expires: 1982-02-01
Abstract
No abstract record available.
Inventors
- 👤 Michael A Canale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:10
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/08; B24C3/10; B24C3/14; B29; B29C; B29C67/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A DEVICE FOR GRAINING, ABRADING OR ROUGHENING THE SURFACE OF MATERIAL COMPRISING A PROCESSING COLUMN AND AN EXHAUST COLUMN IN WHICH THE SAID PROCESSING COLUMN IS SUBSTANTIALLY VERTICAL AND COMPRISES AT LEAST ONE ABRASIVE RESERVOIR, MEANS TO HOLD MATERIAL TO BE PROCESSED BENEATH THE SAID ABRASIVE RESERVOIR, AND BLOWER MEANS MOUNTED IN SAID PROCESSING COLUMN AND LOCATED BETWEEN THE SAID ABRASIVE RESERVOIR AND THE SAID MEANS TO HOLD THE MATERIAL TO BE PROCESSED; WITH THE SAID EXHAUST COLUMN BEING IN SUBSTANTIALLY VERTICAL POSITION AND COMPRISING AT LEAST ONE BAFFLE; PORT MEANS BELOW THE SAID BAFFLE COMMUNICATING BETWEEN THE SAID PROCESSING COLUMN AND THE SAID EXHAUST COLUMN, AND PORT MEANS ABOVE SAID BAFFLE COMMUNICATING WITH THE SAID PROCESSING COLUMN AND THE SAID EXHAUST COLUMN; SAID ABRASIVE RESERVOIR COMPRISING A FLOOR PORTION AND A PLURALITY OF SUBSTANTIALLY VERTICAL HOLLOW SHAFTS COMMUNICATING AT THEIR LOWER ENDS WITH OPENINGS IN THE SAID FLOOR PORTION AND BEING OPEN AT THEIR UPPER ENDS, SAID SHAFTS EXTENDING FROM THE SAID FLOOR PORTION TO A HEIGHT WITHIN THE RESERVOIR GREATER THAN THE HEIGHT OF THE LEVEL OF ABRASIVE CONTAINED IN THE SAID RESERVOIR, SAID PORT MEANS ABOVE THE SAID BAFFLE BEING LOCATED BELOW THE SAID OPEN TOPS OF SAID SHAFTS.
Claim 2
Independent Claim
202 words
A DEVICE FOR GRAINING, ABRADING OR ROUGHENING THE SURFACE OF MATERIAL COMPRISING A PROCESSING COLUMN AND AN EXHAUST COLUMN IN WHICH THE SAID PROCESSING COLUMN IS SUBSTANTIALLY VERTICAL AND COMPRISES AT LEAST ONE ABRASIVE RESERVOIR, MEANS TO HOLD MATERIAL TO BE PROCESSED BENEATH THE SAID ABRASIVE RESERVOIR, AND BLOWER MEANS MOUNTED IN SAID PROCESSING COLUMN AND LOCATED BETWEEN THE SAID ABRASIVE RESERVOIR AND THE SAID MEANS TO HOLD THE MATERIAL TO BE PROCESSED; WITH THE SAID EXHAUST COLUMN BEING IN SUBSTANTIALLY VERTICAL POSITION AND COMPRISING AT LEAST ONE BAFFLE; PORT MEANS BELOW THE SAID BAFFLE COMMUNICATING BETWEEN THE SAID PROCESSING COLUMN AND THE SAID EXHAUST COLUMN, AND PORT MEANS ABOVE SAID BAFFLE COMMUNICATING WITH THE SAID PROCESSING COLUMN AND THE SAID EXHAUST COLUMN; SAID ABRASIVE RESERVOIR COMPRISING A FLOOR PORTION AND A PLURALITY OF SUBSTANTIALLY VERTICAL HOLLOW SHAFTS COMMUNICATING AT THEIR LOWER ENDS WITH OPENINGS IN THE SAID FLOOR PORTION AND BEING OPEN AT THEIR UPPER ENDS, SAID SHAFTS EXTENDING FROM THE SAID FLOOR PORTION TO A HEIGHT WITHIN THE RESERVOIR GREATER THAN THE HEIGHT OF THE LEVEL OF ABRASIVE CONTAINED IN THE SAID RESERVOIR, SAID PORT MEANS ABOVE THE SAID BAFFLE BEING LOCATED BELOW THE SAID OPEN TOPS OF SAID SHAFTS.
References Cited (Backward Citations)
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |