Patent US2214666A successfully refreshed from Google Patents.
US2214666A
Expired / Lapsed
US
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Drilling machine
Assignee: Individual
•
Filing: 1940-03-20
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Granted: 1940-09-10
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Expires: 1960-03-20
Abstract
No abstract record available.
Inventors
- 👤 John E Elf
- 👤 Cecil E Lucas
- 👤 Christie Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:45
CPC Classifications
D; D06; D06H; D06H1/00; D06H1/003; B; B26; B26F; B26F1/00; B26F1/16; C; C14; C14B; C14B1/00; C14B2700/00; C14B2700/28; Y; Y10; Y10S; Y10S29/00; Y10S29/094; Y10T; Y10T408/00; Y10T408/50; Y10T408/51
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) | 1943-09-10 | 1944-03-11 | 1944-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-10 | 1948-03-11 | 1948-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-10 | 1952-03-11 | 1952-09-10 | $7700.00 | Window Closed / Lapsed |