US2832977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic cleaning device
Assignee: Xerox Corp
•
Filing: 1952-02-05
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Granted: 1958-05-06
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Expires: 1972-02-05
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Walkup
- 👤 Jr Herbert E Carlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:43
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0035; G03G2221/00; G03G2221/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1089453A
Cited
US1160892A
Cited
US2357809A
Cited
US2358334A
Cited
GB650025A
Cited
US2576047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |