Patent US3457894A successfully refreshed from Google Patents.
US3457894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coating a flat surface of a disc with protective material
Assignee: Ricoh Printing Systems America Inc
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Filing: 1965-03-29
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Granted: 1969-07-29
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Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Charles W David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:30
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/72; G11B5/725
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2100920A
Cited
US2387349A
Cited
US2787560A
Cited
US3136659A
Cited
US3280792A
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US3352280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |