US3549373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative-to-positive reversible copy sheet
Assignee: Ricoh Co Ltd
•
Filing: 1967-03-13
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Granted: 1970-12-22
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Expires: 1987-03-13
Abstract
No abstract record available.
Inventors
- 👤 Takao Hamada
- 👤 Tsuyoshi Morishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:34
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/12; B41N1/14; G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |