Patent UST969009I4 successfully refreshed from Google Patents.
UST969009I4
Expired / Lapsed
US
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Transfer of magnetic toner particles with a directed magnetic field
Assignee: General Electric Co
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Filing: 1977-04-18
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Granted: 1978-04-04
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Expires: 1997-04-18
Abstract
Abstract magnetic toner images are transferred from a latent magnetic image on a magnetic recording surface to hard copy medium, which may be paper, by (1) disposing the hard copy medium in contact with a toner image; and (2) applying a transfer magnetic field in the region of contact. The transfer magnetic field is directed tangential to the recording surface and has a gradient directed from the recording surface to the copy medium. The intensity of the magnetic transfer field may be greater or less than the intensity which is necessary to erase the latent magnetic image in the magnetic recording surface.
Inventors
- 👤 Joseph A. Lahut
- 👤 Raymond E. Skoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:02
CPC Classifications
G; G03; G03G; G03G19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |