US1347534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for testing wells for oil, gas, &c.
Assignee: J W CHANCELLOR
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Filing: 1920-06-24
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Granted: 1920-07-27
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Expires: 1940-06-24
Abstract
No abstract record available.
Inventors
- 👤 Ernest H Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:00
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/081
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) | 1923-07-27 | 1924-01-26 | 1924-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-07-27 | 1928-01-26 | 1928-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-07-27 | 1932-01-26 | 1932-07-27 | $7700.00 | Window Closed / Lapsed |