US3028799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electrophotographic printing
Assignee: DANIEL FRANKLIN KELLER
•
Filing: 1957-03-08
•
Granted: 1962-04-10
•
Expires: 1977-03-08
Abstract
No abstract record available.
Inventors
- 👤 Keller Daniel Franklin
- 👤 Harry E Gunning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2732775A
Cited
US2221776A
Cited
US2297691A
Cited
US2551582A
Cited
US2543051A
Cited
US2695363A
Cited
US2693416A
Cited
US2781704A
Cited
US2843084A
Cited
US2831409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |