Patent DE1152643B successfully refreshed from Google Patents.
US3153177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic holder for paper clips
Assignee: Ketcham and Mcdougall Inc
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Filing: 1962-09-11
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Granted: 1964-10-13
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Expires: 1982-09-11
Abstract
No abstract record available.
Inventors
- 👤 Mcfadyen Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:33
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A HOLDER FOR PAPER CLIPS AND THE LIKE, IN COMBINATION, A BASE, A PLURALITY OF MAGNETS MOUNTED IN STACKED ARRAY ON SAID BASE, SAID MAGNETS BEING ANNULAR AND AXIALLY MAGNETIZED FORMING A NORTH POLE ON ONE EDGE AND A SOUTH POLE AT THE OTHER, ONE FACE OF EACH SAID MAGNET BEING PROVIDED WITH A REDUCED PORTION, SPACING WASHERS OF MAGNETIZABLE MATERIAL HAVING CLEARANCE HOLES THEREIN, SAID SPACING WASHERS BEING CUP-SHAPED, SAID REDUCED PORTION OF SAID MAGNET FITTING WITHIN THE PERIPHERY OF THE CORRESPONDING CUP-SHAPED WASHER, AND A ROD PASSING THROUGH THE CENTERS OF SAID MAGNETS AND THROUGH SAID WASHER CLEARANCE HOLES, SAID ROD SERVING TO SHUNT THE MAGNETIC FLUX OF THE COMPLETE ARRAY OF MAGNETS, SAID WASHERS SERVING TO PARTIALLY SHUNT INDIVIDUAL MAGNETS, SAID ROD HAVING AN ENLARGED HEAD BEARING AGAINST THE UPPERMOST WASHER AND AN ENLARGED AREA AT THE BASE IN MAGNETIC CONTACT WITH THE LOWERMOST WASHER.
Claim 2
Dependent Claim
149 words
IN A HOLDER FOR PAPER CLIPS AND THE LIKE, IN COMBINATION, A BASE, A PLURALITY OF MAGNETS MOUNTED IN STACKED ARRAY ON SAID BASE, SAID MAGNETS BEING ANNULAR AND AXIALLY MAGNETIZED FORMING A NORTH POLE ON ONE EDGE AND A SOUTH POLE AT THE OTHER, ONE FACE OF EACH SAID MAGNET BEING PROVIDED WITH A REDUCED PORTION, SPACING WASHERS OF MAGNETIZABLE MATERIAL HAVING CLEARANCE HOLES THEREIN, SAID SPACING WASHERS BEING CUP-SHAPED, SAID REDUCED PORTION OF SAID MAGNET FITTING WITHIN THE PERIPHERY OF THE CORRESPONDING CUP-SHAPED WASHER, AND A ROD PASSING THROUGH THE CENTERS OF SAID MAGNETS AND THROUGH SAID WASHER CLEARANCE HOLES, SAID ROD SERVING TO SHUNT THE MAGNETIC FLUX OF THE COMPLETE ARRAY OF MAGNETS, SAID WASHERS SERVING TO PARTIALLY SHUNT INDIVIDUAL MAGNETS, SAID ROD HAVING AN ENLARGED HEAD BEARING AGAINST THE UPPERMOST WASHER AND AN ENLARGED AREA AT THE BASE IN MAGNETIC CONTACT WITH THE LOWERMOST WASHER.
References Cited (Backward Citations)
GB307578A
Cited
US3051875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |