Patent US2802949A successfully refreshed from Google Patents.
US2802949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of undercutting of latent xeroradiographic images
Assignee: Xerox Corp
•
Filing: 1954-12-06
•
Granted: 1957-08-13
•
Expires: 1974-12-06
Abstract
No abstract record available.
Inventors
- 👤 Lehmann Ernest Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:56
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/054; G03G15/0545; Y; Y10; Y10S; Y10S430/00; Y10S430/167
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1550499A
Cited
US2566266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |