Patent US3477846A successfully refreshed from Google Patents.
US3477846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic charge transfer process
Assignee: GAF Corp
•
Filing: 1967-05-01
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Granted: 1969-11-11
•
Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 John W Weigl
- 👤 Alan B Amidon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3127333A
Cited
US2598732A
Cited
US3084061A
Cited
US2886434A
Cited
US2860048A
Cited
US2863768A
Cited
US2955938A
Cited
US2963365A
Cited
US2982647A
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US3124456A
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US3249430A
Cited
US3169062A
Cited
US3285740A
Cited
US3281857A
Cited
US3196012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |