US3439983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfilm copier double input
Assignee: Xerox Corp
•
Filing: 1966-04-01
•
Granted: 1969-04-22
•
Expires: 1986-04-01
Abstract
No abstract record available.
Inventors
- 👤 James H Blow Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:37
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; H; H10; H10N; H10N80/00; G03G15/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2515862A
Cited
US2931027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |