US2912799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lapping machine
Assignee: ABRADING SYSTEMS Co
•
Filing: 1956-06-28
•
Granted: 1959-11-17
•
Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Boettcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:33
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/04; B24B37/07; B24B37/10; B24B37/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US605283A
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US926101A
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USRE23937E
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US1511141A
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US1683622A
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US2209071A
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US2274332A
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US2421498A
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US2581106A
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US2762172A
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US2782571A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |