US3392432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic roller for electro-photographic development
Assignee: Azoplate Corp
•
Filing: 1964-12-16
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Granted: 1968-07-16
•
Expires: 1984-12-16
Abstract
No abstract record available.
Inventors
- 👤 Naumann Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:12
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0921; H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252; H01F7/0268; Y; Y10; Y10S; Y10S100/00; Y10S100/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A MAGNETIC ROLLER FOR DEVELOPING LATENT ELECTROSTATIC IMAGES COMPRISING A ROLLER SHELL HAVING A PLURALITY OF SUBSTANTIALLY AXIALLY PARALLEL SOFT MAGNETIC POLE SHOES ON THE CIRCUMFERENCE THEREOF, SAID SHOES BEING SEPARATED BY NON-MAGNETIC STRIPS HAVING RELATIVELY HIGH MAGNETIC RESISTANCE, AND MAGNETIZING MEANS INSIDE THE ROLLER SHELL INCLUDING A PLURALITY OF SUBSTANTIALLY AXIALLY PARALLEL PERMANENT MAGNET MAGNETIC POLES, THE ROLLER SHELL AND THE MAGNETIZING MEANS HAVING A COMMON AXIS AND BEING RELATIVELY ROTATABLE TO POSTIONS WHEREBY A MAGNETIC FIELD OF SUFFICIENT STRENGHT TO HOLD MAGNETIC DEVELOPER MATERIAL IS PRODUCED ON SAID ROLLER AND TO POSITIONS WHERE SAID MAGNETIC POLES ARE OPPOSITE SAID NON-MAGNETIC STRIPS.
Claim 2
Dependent Claim
103 words
A MAGNETIC ROLLER FOR DEVELOPING LATENT ELECTROSTATIC IMAGES COMPRISING A ROLLER SHELL HAVING A PLURALITY OF SUBSTANTIALLY AXIALLY PARALLEL SOFT MAGNETIC POLE SHOES ON THE CIRCUMFERENCE THEREOF, SAID SHOES BEING SEPARATED BY NON-MAGNETIC STRIPS HAVING RELATIVELY HIGH MAGNETIC RESISTANCE, AND MAGNETIZING MEANS INSIDE THE ROLLER SHELL INCLUDING A PLURALITY OF SUBSTANTIALLY AXIALLY PARALLEL PERMANENT MAGNET MAGNETIC POLES, THE ROLLER SHELL AND THE MAGNETIZING MEANS HAVING A COMMON AXIS AND BEING RELATIVELY ROTATABLE TO POSTIONS WHEREBY A MAGNETIC FIELD OF SUFFICIENT STRENGHT TO HOLD MAGNETIC DEVELOPER MATERIAL IS PRODUCED ON SAID ROLLER AND TO POSITIONS WHERE SAID MAGNETIC POLES ARE OPPOSITE SAID NON-MAGNETIC STRIPS.
References Cited (Backward Citations)
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US2177809A
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US2968402A
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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) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |