Patent US3364020A successfully refreshed from Google Patents.
US3364020A
Expired / Lapsed
US
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Photo-electret multiple copy process
Assignee: AB Dick Co
•
Filing: 1964-04-01
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Granted: 1968-01-16
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Expires: 1984-04-01
Abstract
No abstract record available.
Inventors
- 👤 Richard A Fehlberg
- 👤 Dave R Kazen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:18
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/024; G03G13/00; G03G13/14; G03G13/16; G03G13/22; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2756676A
Cited
US2976144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |