US3515115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lapping machine
Assignee: Speedfam Corp
•
Filing: 1967-09-14
•
Granted: 1970-06-02
•
Expires: 1987-09-14
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Boettcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:13
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/04; B24B37/07; B24B37/10; B24B37/102; B24B41/00; B24B41/04; B24B41/047; B24B53/00; B24B53/017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2079076A
Cited
FR1054096A
Cited
US2696067A
Cited
US3035377A
Cited
US3300907A
Cited
US3290832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |