US2622699A
Expired / Lapsed
US
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Gear case with magnetic lubricant purifying means
Assignee: INTERNAT DERRICK AND EQUIPMENT
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Filing: 1950-11-15
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Granted: 1952-12-23
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Expires: 1970-11-15
Abstract
No abstract record available.
Inventors
- 👤 Kenneth N Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:16
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/045; B; B03; B03C; B03C1/00; B03C1/02; B03C1/025; B03C1/031; B03C1/033; B03C1/0332; B03C1/28; B03C1/286; B03C1/30; F16N; F16N39/00; F16N39/06; B03C2201/00; B03C2201/18; F16H57/0402; F16H57/0404; F16H57/048; F16H57/0493; F16H57/0495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |