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US2092338A
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Formation tester
Assignee: TECHNICRAFT ENGINEERING CORP
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Filing: 1935-05-01
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Granted: 1937-09-07
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Expires: 1955-05-01
Abstract
No abstract record available.
Inventors
- 👤 Spencer Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:31
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/14; E21B49/00; E21B49/08; E21B49/087; F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7923
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) | 1940-09-06 | 1941-03-08 | 1941-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-09-06 | 1945-03-08 | 1945-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-09-06 | 1949-03-08 | 1949-09-07 | $7700.00 | Window Closed / Lapsed |