Patent US3574682A successfully refreshed from Google Patents.
US3574682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic recording materials
Assignee: Individual
•
Filing: 1968-04-11
•
Granted: 1971-04-13
•
Expires: 1988-04-11
Abstract
Abstract AN ELECTROSTATOGRAPHIC RECORDING MATERIAL COMPRISING A NONCONDUCTIVE SUPPORT HAVING THEREON A MEMBER SELECTED FROM THE GROUP CONSISTING OF A PHOTOCONDUCTIVE INSULATING LAYER OR AN ELECTRO-INSULATING LAYER, CHARACTERIZED IN THAT A LAYER HAVING A LOW ELECTRIC RESISTANCE COMPRISING A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYVINYLBENZENE SULFONIC ACID AND A WATER-SOLUBLE SALT THEREOF IS INTERPOSED THEREBETWEEN.
Inventors
- 👤 Satoru Honjo
- 👤 Yoji Tsuneoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:09
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/087; G03G5/10; G03G5/105; G03G5/108; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |