US3522990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper feeding apparatus for electrophotography
Assignee: Ricoh Co Ltd
•
Filing: 1967-09-15
•
Granted: 1970-08-04
•
Expires: 1987-09-15
Abstract
No abstract record available.
Inventors
- 👤 Yutaka Koizumi
- 👤 Tadaaki Kanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:36
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/22; G03G15/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US794146A
Cited
US2296152A
Cited
US2995359A
Cited
US3040642A
Cited
US3164074A
Cited
US3121375A
Cited
US3301126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |