US3050580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic techniques
Assignee: Xerox Corp
•
Filing: 1957-02-04
•
Granted: 1962-08-21
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Expires: 1977-02-04
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Schwertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:01
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; H; H04; H04N; H04N1/00; H04N1/23; H04N1/29; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2370160A
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US2743430A
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US2738499A
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US2716048A
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US2903509A
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US2967082A
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US2894799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |