US3374582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lapping machine
Assignee: Speedfam Corp
•
Filing: 1964-12-08
•
Granted: 1968-03-26
•
Expires: 1984-12-08
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Boettcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:24
CPC Classifications
B; B24; B24B; B24B53/00; B24B53/017; B24B37/00; B24B37/005; B24B37/04; B24B41/00; B24B41/04; B24B41/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2079076A
Cited
FR913570A
Cited
US2687603A
Cited
DE1093251B
Cited
US2979868A
Cited
US2968135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |