US1539742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of grinding
Assignee: MICRO MACHINE Co
•
Filing: 1923-05-15
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Granted: 1925-05-26
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Expires: 1943-05-15
Abstract
No abstract record available.
Inventors
- 👤 Harry F Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:00
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/36; B24B5/40; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/005; B24B55/00; B24B55/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-05-25 | 1928-11-24 | 1929-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-05-25 | 1932-11-24 | 1933-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-05-25 | 1936-11-24 | 1937-05-26 | $7700.00 | Window Closed / Lapsed |