US3349703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printing with two groups of particles of same composition and different size
Assignee: Interchemical Corp
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Filing: 1967-04-24
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Granted: 1967-10-31
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Expires: 1987-04-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Varron
- 👤 Frank W Dunne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:29
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G13/00; G03G13/06; G03G13/08; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF ELECTROSTATIC PRINTING WHEREIN A PREFORMED IMAGED OF CHARGED POWDER PARTICLES ARE APPLIED TO A SUBSTRATE BEARING AN OPPOSITE CHARGE, THE IMPROVEMENT WHICH COMPRISES APPLYING TO SAID SUBSTRATE A MIXTURE OF TWO BATCHES OF PARTICLES HAVING THE SAME COMPOSITION AND THE SAME CHARGE BUT DIFFERENT AVERAGE DIAMETERS, SAID MIXTURE CONTAINING FROM 1 TO 4 PARTS BY WEIGHT OF THE BATCH HAVING THE SMALLER AVERAGE DIAMETER BEING USED FOR EACH PART OF THE BATCH HAVING THE LARGER AVERAGE DIAMETER, THE SMALLER AVERAGE DIAMETER BEING FROM 2 TO 1I MICRONS AND THE LARGER AVERAGE DIAMETER BEING AT LEAST 1.5 TIMES THE SIZE OF THE SMALLER DIAMETER.
Claim 2
Independent Claim
106 words
A METHOD OF ELECTROSTATIC PRINTING WHEREIN A PREFORMED IMAGED OF CHARGED POWDER PARTICLES ARE APPLIED TO A SUBSTRATE BEARING AN OPPOSITE CHARGE, THE IMPROVEMENT WHICH COMPRISES APPLYING TO SAID SUBSTRATE A MIXTURE OF TWO BATCHES OF PARTICLES HAVING THE SAME COMPOSITION AND THE SAME CHARGE BUT DIFFERENT AVERAGE DIAMETERS, SAID MIXTURE CONTAINING FROM 1 TO 4 PARTS BY WEIGHT OF THE BATCH HAVING THE SMALLER AVERAGE DIAMETER BEING USED FOR EACH PART OF THE BATCH HAVING THE LARGER AVERAGE DIAMETER, THE SMALLER AVERAGE DIAMETER BEING FROM 2 TO 1I MICRONS AND THE LARGER AVERAGE DIAMETER BEING AT LEAST 1.5 TIMES THE SIZE OF THE SMALLER DIAMETER.
References Cited (Backward Citations)
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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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |