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Patent US3534427A successfully refreshed from Google Patents.
US3534427A
Expired / Lapsed
US
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Cleaning apparatus for electrostatic printing machines
Assignee: Xerox Corp
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Filing: 1968-03-18
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Granted: 1970-10-20
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Expires: 1988-03-18
Abstract
No abstract record available.
Inventors
- 👤 Gerard T Severynse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:11
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0035; D; D01; D01H; D01H5/00; D01H5/18; D01H5/60; D01H5/64; D01H5/645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2482781A
Cited
US3278972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |