Patent US3247430A successfully refreshed from Google Patents.
US3247430A
Expired / Lapsed
US
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Electrostatic charging apparatus
Assignee: Eastman Kodak Co
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Filing: 1962-09-27
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Granted: 1966-04-19
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Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 John G Streiffert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:51
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0291
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
CORONA CHARGING APPARATUS COMPRISING AN INSULATING CYLINDER ROTATABLE ABOUT ITS AXIS, A CONDUCTING BARE WIRE FORMED AS A RELATIVELY SMALL DIAMETER HELIX HAVING A SUBSTANTIALLY CIRCULAR OR POLYGONAL CROSS-SECTION SPIRALLY WOUND ON SAID CYLINDER, THE AXIS OF SAID SMALL DIAMETER HELIX FORMING A RELATIVELY LARGE DIAMETER HELIX ABOUT SAID CYLINDER AXIS, AND ELECTRIC POTENTIAL MEANS CONNECTED TO SAID WIRE FOR GENERATING A CORONA DISCHARGE.
Claim 2
Dependent Claim
64 words
CORONA CHARGING APPARATUS COMPRISING AN INSULATING CYLINDER ROTATABLE ABOUT ITS AXIS, A CONDUCTING BARE WIRE FORMED AS A RELATIVELY SMALL DIAMETER HELIX HAVING A SUBSTANTIALLY CIRCULAR OR POLYGONAL CROSS-SECTION SPIRALLY WOUND ON SAID CYLINDER, THE AXIS OF SAID SMALL DIAMETER HELIX FORMING A RELATIVELY LARGE DIAMETER HELIX ABOUT SAID CYLINDER AXIS, AND ELECTRIC POTENTIAL MEANS CONNECTED TO SAID WIRE FOR GENERATING A CORONA DISCHARGE.
References Cited (Backward Citations)
US2300324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |