Patent US3531646A successfully refreshed from Google Patents.
US3531646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhancement of electrostatic images
Assignee: Xerox Corp
•
Filing: 1966-09-29
•
Granted: 1970-09-29
•
Expires: 1986-09-29
Abstract
No abstract record available.
Inventors
- 👤 Benjamin Kazan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:39
CPC Classifications
G; G04; G04B; G04B21/00; G04B21/02; G04B21/027; G03; G03G; G03G13/00; G03G13/04; G03G13/045; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3264479A
Cited
US2927234A
Cited
US3169192A
Cited
US3186839A
Cited
US3322539A
Cited
US3348074A
Cited
US3441736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |