Patent US1221524A successfully refreshed from Google Patents.
US3370846A
Expired / Lapsed
US
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Electrostatic hold-down device
Assignee: Harris Graphics Corp
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Filing: 1965-03-29
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Granted: 1968-02-27
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Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Michael H Semenhuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:49
CPC Classifications
B; B41; B41F; B41F21/00; B41F21/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN AN ELECTROSTATIC SYSTEM FOR ESTABLISHING AN ELECTROSTATIC FIELD AND IONIZED PARTICLES IN THE FIELD, AN ELECTROSTATIC DEVICE FOR ESTABLISHING AN ELECTRIC FIELD BETWEEN THE DEVICE AND A CONDUCTIVE MEMBER AND FOR PRODUCING IONIZED PARTICLES WHICH ARE DIRECTED TOWARD THE CONDUCTIVE MEMBER BY THE FIELD, SAID DEVICE COMPRISING A CONDUCTOR HAVING A HIGH VOLTAGE APPLIED THERETO RELATIVE TO SAID CONDUCTIVE MEMBER TO ESTABLISH SAID FIELD, AN INSULATING HOUSING HAVING AN EXPOSED SURFACE AND SURFACES ADJACENT SAID CONDUCTOR COVERING SAID CONDUCTOR TO PROTECT OPERATING PERSONNEL FROM THE HIGH VOLTAGE APPLIED THERETO AND EXPOSING A PART OF SAID CONDUCTOR FACING SAID CONDUCTIVE
Claim 2
Dependent Claim
100 words
IN AN ELECTROSTATIC SYSTEM FOR ESTABLISHING AN ELECTROSTATIC FIELD AND IONIZED PARTICLES IN THE FIELD, AN ELECTROSTATIC DEVICE FOR ESTABLISHING AN ELECTRIC FIELD BETWEEN THE DEVICE AND A CONDUCTIVE MEMBER AND FOR PRODUCING IONIZED PARTICLES WHICH ARE DIRECTED TOWARD THE CONDUCTIVE MEMBER BY THE FIELD, SAID DEVICE COMPRISING A CONDUCTOR HAVING A HIGH VOLTAGE APPLIED THERETO RELATIVE TO SAID CONDUCTIVE MEMBER TO ESTABLISH SAID FIELD, AN INSULATING HOUSING HAVING AN EXPOSED SURFACE AND SURFACES ADJACENT SAID CONDUCTOR COVERING SAID CONDUCTOR TO PROTECT OPERATING PERSONNEL FROM THE HIGH VOLTAGE APPLIED THERETO AND EXPOSING A PART OF SAID CONDUCTOR FACING SAID CONDUCTIVE
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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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |