US2689144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for borehole thermometer piston rods
Assignee: Standard Oil Development Co
•
Filing: 1950-10-20
•
Granted: 1954-09-14
•
Expires: 1970-10-20
Abstract
No abstract record available.
Inventors
- 👤 Leo V Uhrig
- 👤 Jr John N Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:40
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/06; E21B47/07; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190521099A
Cited
US1688832A
Cited
US1770559A
Cited
US2183126A
Cited
US2404410A
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US2401379A
Cited
US2518540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |