Patent US3554778A successfully refreshed from Google Patents.
US3554778A
Expired / Lapsed
US
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Method for developing latent electroscopic images
Assignee: AB Dick Co
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Filing: 1966-04-19
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Granted: 1971-01-12
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Expires: 1986-04-19
Abstract
Abstract DISCLOSED IS A METHOD OF DEVELOPIN LATENT ELECTROSTATIC IMAGES WHICH COMPRISES PASSING THE SURFACE CONTAINING THE IMAGE THROUGH A FLUID-LIKE GRANULAR DEVELOPING COMPOSITION COMPOSED OF TONER PARTICLES AND CARRIER PARTICLES WHEREIN THE CARRIER PARTICLES ARE COMPOSED OF SILICATES OF CALCIUM, MAGNESIUM, ALUMINUM OR SILICA. THE SURFACE ARE AND BULK DENSITY OF THE CARRIER COMPONENT IS ABOUT 95-200 SQ. METERS/G. AND 5-15LBS./CU. FT. RESPECTIVELY.
Inventors
- 👤 Daniel B Granzow Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:03
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |