US3486274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for honing magnetic discs
Assignee: Ricoh Printing Systems America Inc
•
Filing: 1965-06-14
•
Granted: 1969-12-30
•
Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Charles W David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:52
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24D; B24D13/00; B24D13/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US774857A
Cited
US1508396A
Cited
US1673910A
Cited
US2164418A
Cited
US2145310A
Cited
US2419739A
Cited
US2719390A
Cited
US2771718A
Cited
US3161996A
Cited
US2912802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |