Patent US2037307A successfully refreshed from Google Patents.
US2037307A
Expired / Lapsed
US
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Rock drill
Assignee: Individual
•
Filing: 1935-08-09
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Granted: 1936-04-14
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Expires: 1955-08-09
Abstract
No abstract record available.
Inventors
- 👤 Bowman Edward Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:31
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/36; E21B10/38; F; F16; F16B; F16B2200/00; F16B2200/10; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17111; Y10T279/17128; Y10T279/17162; Y10T279/17761; Y10T279/17786; Y10T403/00; Y10T403/60; Y10T403/602; Y10T403/70; Y10T403/7075; Y10T403/7077
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) | 1939-04-14 | 1939-10-14 | 1940-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-14 | 1943-10-14 | 1944-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-14 | 1947-10-14 | 1948-04-14 | $7700.00 | Window Closed / Lapsed |