Patent US2331047A successfully refreshed from Google Patents.
Patent US3385730A successfully refreshed from Google Patents.
US3385730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing medium for electrostatic printing
Assignee: AB Dick Co
•
Filing: 1964-04-01
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Granted: 1968-05-28
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Expires: 1984-04-01
Abstract
No abstract record available.
Inventors
- 👤 Earl B Relph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:22
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/10; G03G5/101; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24835; Y10T428/31504; Y10T428/31511; Y10T428/31786; Y10T428/3179; Y10T428/31801; Y10T428/31804; Y10T428/31808; Y10T428/31844; Y10T428/31848; Y10T428/31851; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31906; Y10T428/31931; Y10T428/31935; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T428/31986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2776251A
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US3216853A
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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) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |