US3464820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic engraving plate
Assignee: Fairchild Semiconductor Corp
•
Filing: 1968-06-03
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Granted: 1969-09-02
•
Expires: 1988-06-03
Abstract
No abstract record available.
Inventors
- 👤 Michael Michalchik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:01
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G5/00; G03G5/14; G03G5/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2662835A
Cited
US2876226A
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US3060150A
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US3082085A
Cited
US3107198A
Cited
US3136796A
Cited
US3231375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |