US2201311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for indicating the position of devices in pipes
Assignee: Halliburton Oil Well Cementing Co
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Filing: 1936-12-24
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Granted: 1940-05-21
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Expires: 1956-12-24
Abstract
No abstract record available.
Inventors
- 👤 Erle P Halliburton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:47
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/04; E21B33/00; E21B33/10; E21B33/13; E21B33/14; E21B33/16; E21B47/09; E21B47/095; E21B47/12; E21B47/14; E21B47/16
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) | 1943-05-21 | 1943-11-20 | 1944-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-21 | 1947-11-20 | 1948-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-21 | 1951-11-20 | 1952-05-21 | $7700.00 | Window Closed / Lapsed |