US3591503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatographic developer
Assignee: Xerox Corp
•
Filing: 1967-04-17
•
Granted: 1971-07-06
•
Expires: 1987-04-17
Abstract
Abstract A XEROGRAPHIC CARRIER BEAD MATERIAL FOR USE IN DEVELOPING ELECTROSTATIC LATENT IMAGES COMPRISING A GLASS COMPOSITION OF FROM ABOUT 10 TO ABOUT 40 PARTS OXIDES OF SILICON, FROM ABOUT 5 TO ABOUT 50 PARTS OXIDES OF BARIUM, AND OXIDES OF METALS SELECTED FROM THE GROUP CONSISITING OF TITANIUM, LEAD AND MIXTURES THEREOF, ALL PARTS BEING BASED ON A TOTAL OF 100 PARTS BY WEIGHT OF THE GLASS COMPOSITION.
Inventors
- 👤 Robert J Hagenbach
- 👤 Myron J Lenhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:06
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/06; G03G13/08; G03G9/00; G03G9/08; G03G9/10; G03G9/103; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996; Y10T428/2998
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |