US2965754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double screen corona device
Assignee: Xerox Corp
•
Filing: 1958-03-26
•
Granted: 1960-12-20
•
Expires: 1978-03-26
Abstract
No abstract record available.
Inventors
- 👤 John T Bickmore
- 👤 Hoffman James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:25
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0291; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US940429A
Cited
GB679974A
Cited
US2808328A
Cited
US2712607A
Cited
GB781497A
Cited
US2885556A
Cited
US2890343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |