US3141840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for producing ferromagnetic particles
Assignee: US Philips Corp
•
Filing: 1961-03-31
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Granted: 1964-07-21
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
- 👤 Melse Jan Leendert
- 👤 Baeyens Petrus
- 👤 Flaes Ewoud Adriaan Boonzajer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:49
CPC Classifications
C; C25; C25C; C25C5/00; C25C5/02; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A DEVICE FOR CONTINUOUSLY MANUFACTURING A SMALL ELONGATED PARTICLES OF FERROMAGNETIC MATERIAL, AN ELECTROLYTIC APPARATUS FOR PRODUCING A SUPPLY OF PARTICLECONTAINING MERCURY COMPRISING, A CUP-SHAPED CONTAINER ADAPTED TO BE FILLED TO THE RIM WITH A SOLUTION OF IONS OF THE FERROMAGNETIC MATERIAL, AN ANODE, AND A CATHODE SPACED FROM SAID ANODE AND INCLUDING A CUP-SHAPED MEMBER ADAPTED TO BE FILLED TO ITS RIM WITH MERCURY, SAID MEMBER BEING ARRANGED WITHIN SAID CONTAINER WITH ITS RIM BELOW THE RIM OF SAID CONTAINER AND WITH ITS WALL SPACED FROM THE CONTAINER TO FORM A PASSAGEWAY THEREWITH, MEANS TO INTERMITTENTLY SUPPLY MERCURY TO SAID CUP-SHAPED MEMBER AT A POINT BELOW THE RIM THEREOF TO THEREBY CAUSE PARTICLE-CONTAINING SURFACE PORTIONS OF THE MERCURY TO INTERMITTENTLY FLOW OVER THE RIM OF THE MEMBER AND
Claim 2
Dependent Claim
130 words
IN A DEVICE FOR CONTINUOUSLY MANUFACTURING A SMALL ELONGATED PARTICLES OF FERROMAGNETIC MATERIAL, AN ELECTROLYTIC APPARATUS FOR PRODUCING A SUPPLY OF PARTICLECONTAINING MERCURY COMPRISING, A CUP-SHAPED CONTAINER ADAPTED TO BE FILLED TO THE RIM WITH A SOLUTION OF IONS OF THE FERROMAGNETIC MATERIAL, AN ANODE, AND A CATHODE SPACED FROM SAID ANODE AND INCLUDING A CUP-SHAPED MEMBER ADAPTED TO BE FILLED TO ITS RIM WITH MERCURY, SAID MEMBER BEING ARRANGED WITHIN SAID CONTAINER WITH ITS RIM BELOW THE RIM OF SAID CONTAINER AND WITH ITS WALL SPACED FROM THE CONTAINER TO FORM A PASSAGEWAY THEREWITH, MEANS TO INTERMITTENTLY SUPPLY MERCURY TO SAID CUP-SHAPED MEMBER AT A POINT BELOW THE RIM THEREOF TO THEREBY CAUSE PARTICLE-CONTAINING SURFACE PORTIONS OF THE MERCURY TO INTERMITTENTLY FLOW OVER THE RIM OF THE MEMBER AND
References Cited (Backward Citations)
US501783A
Cited
US2093770A
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US2239144A
Cited
FR855883A
Cited
US2367811A
Cited
US2624702A
Cited
US2974104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |