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US1910890A
Expired / Lapsed
US
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Hydraulic feed for rotary drills
Assignee: SHELDON MACHINERY Corp
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Filing: 1930-06-06
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Granted: 1933-05-23
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Expires: 1950-06-06
Abstract
No abstract record available.
Inventors
- 👤 Fortune James Clephane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:15
CPC Classifications
E; E21; E21B; E21B3/00; E21B3/02; E21B3/04; E21B19/00; E21B19/08; E21B19/086; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6757
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) | 1936-05-22 | 1936-11-21 | 1937-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-22 | 1940-11-21 | 1941-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-22 | 1944-11-21 | 1945-05-23 | $7700.00 | Window Closed / Lapsed |