Patent US3207625A successfully refreshed from Google Patents.
US3207625A
Expired / Lapsed
US
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Electrostatic record medium
Assignee: Unisys Corp
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Filing: 1961-09-21
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Granted: 1965-09-21
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Expires: 1981-09-21
Abstract
No abstract record available.
Inventors
- 👤 Philip A Stowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:13
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN ELECTROSTATIC RECORD MEDIUM COMPRISING: (A) A PLIABLE BACKING OF PAPER; (B) A THIN LAYER OF ELECTRICALLY CONDUCTIVE INK COATED ON ONE SURFACE THEREOF; (C) AND A THIN LAYER OF OPAQUE, NON-HEAT SENSITIVE, NON-MARKABLE DIELECTRIC MATERIAL OF HIGH VOLUME RESISTIVITY CAPABLE OF RECEIVING AND RETAINING ELECTRICAL CHARGES, SAID DIELECTRIC MATERIAL BEING COATED OVER SAID CONDUCTIVE INK IN A MANNER SANDWICHING AND CONCEALING SAID CONDUCTIVE INK COATING BETWEEN SAID PAPER BACKING AND SAID DIELECTRIC COATING, SAID DIELECTRIC MATERIAL INCLUDING A PIGMENT IN A QUANTITY SUFFICIENT TO IMPART TO IT SAID OPAQUENESS, AND SAID DIELECTRIC MATERIAL BEING CAPABLE OF HAVING ALL OF SAID CONDUCTIVE INK REMAIN CONCEALED BOTH DURING AND AFTER ELECTROSTATIC PRINTING ON SAID RECORD MEDIUM.
Claim 2
Dependent Claim
115 words
AN ELECTROSTATIC RECORD MEDIUM COMPRISING: (A) A PLIABLE BACKING OF PAPER; (B) A THIN LAYER OF ELECTRICALLY CONDUCTIVE INK COATED ON ONE SURFACE THEREOF; (C) AND A THIN LAYER OF OPAQUE, NON-HEAT SENSITIVE, NON-MARKABLE DIELECTRIC MATERIAL OF HIGH VOLUME RESISTIVITY CAPABLE OF RECEIVING AND RETAINING ELECTRICAL CHARGES, SAID DIELECTRIC MATERIAL BEING COATED OVER SAID CONDUCTIVE INK IN A MANNER SANDWICHING AND CONCEALING SAID CONDUCTIVE INK COATING BETWEEN SAID PAPER BACKING AND SAID DIELECTRIC COATING, SAID DIELECTRIC MATERIAL INCLUDING A PIGMENT IN A QUANTITY SUFFICIENT TO IMPART TO IT SAID OPAQUENESS, AND SAID DIELECTRIC MATERIAL BEING CAPABLE OF HAVING ALL OF SAID CONDUCTIVE INK REMAIN CONCEALED BOTH DURING AND AFTER ELECTROSTATIC PRINTING ON SAID RECORD MEDIUM.
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |