Patent US2793288A successfully refreshed from Google Patents.
US2793288A
Expired / Lapsed
US
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Apparatus for electrostatic recording and reproducing
Assignee: Individual
•
Filing: 1950-02-21
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Granted: 1957-05-21
•
Expires: 1970-02-21
Abstract
No abstract record available.
Inventors
- 👤 Charles F Pulvari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:18
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; G; G11; G11C; G11C11/00; G11C11/21; G11C11/22; G11C13/00; G11C13/04; G11C13/047; H01J31/00; H01J31/08; H01J31/58; H01J31/60
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |