US1870970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making blind cage sleeves with ball guide integral
Assignee: Emsco Derrick and Equipment Co
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Filing: 1930-03-07
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Granted: 1932-08-09
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Expires: 1950-03-07
Abstract
No abstract record available.
Inventors
- 👤 Edward E Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:48
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/001; Y; Y10; Y10S; Y10S29/00; Y10S29/026; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49426; Y10T29/496; Y10T29/49995; Y10T29/49996
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) | 1935-08-09 | 1936-02-08 | 1936-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-09 | 1940-02-08 | 1940-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-09 | 1944-02-08 | 1944-08-09 | $7700.00 | Window Closed / Lapsed |