US3672928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatographic developers having carriers comprising polyester coated cores
Assignee: Xerox Corp
•
Filing: 1970-02-03
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Granted: 1972-06-27
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Expires: 1990-02-03
Abstract
Abstract A CARRIER FOR ELECTROSTATOGRAPHIC DEVELOPER MIXTURES IS PROVIDED COMPRISING A CORE COATED WITH A POLYESTER PREPARED FROM DIALLYL PHTHALATE, DIALLYL ISOPHTHALATE OR DIALLYL CHLORENDATE OR PREPOLYMERS THEREOF.
Inventors
- 👤 Robert William Madrid
- 👤 Robert Joseph Hagenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:00
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; G03G9/113; G03G9/1132; G03G9/1135
Claims Analysis
Total Claims: 0
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |