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US1330736A
Expired / Lapsed
US
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Well-drilling device
Assignee: Individual
•
Filing: 1919-06-03
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Granted: 1920-02-10
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Expires: 1939-06-03
Abstract
No abstract record available.
Inventors
- 👤 Church Walter Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:01
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14; Y; Y10; Y10S; Y10S425/00; Y10S425/107
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) | 1923-02-09 | 1923-08-11 | 1924-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-02-09 | 1927-08-11 | 1928-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-02-09 | 1931-08-11 | 1932-02-10 | $7700.00 | Window Closed / Lapsed |