Patent US1891220A successfully refreshed from Google Patents.
US1891220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Head-stock for machine tools
Assignee: Individual
•
Filing: 1931-07-17
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Granted: 1932-12-20
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Expires: 1951-07-17
Abstract
No abstract record available.
Inventors
- 👤 Stanley W Bath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:09
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/70; B23B; B23B3/00; B23B3/30; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2552; Y10T82/2564
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) | 1935-12-20 | 1936-06-20 | 1936-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-12-20 | 1940-06-20 | 1940-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-12-20 | 1944-06-20 | 1944-12-20 | $7700.00 | Window Closed / Lapsed |