US2417181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well pressure control system
Assignee: JAMES MORRISON BRASS Manufacturing CO LT
•
Filing: 1942-06-08
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Granted: 1947-03-11
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Expires: 1962-06-08
Abstract
No abstract record available.
Inventors
- 👤 Sandilands James Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:52
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/4958
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1188489A
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US1389920A
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US2009989A
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US2023033A
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US2073890A
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US2116856A
Cited
US2148327A
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US2220359A
Cited
US2291143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-10 | 1950-09-09 | 1951-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-10 | 1954-09-09 | 1955-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-10 | 1958-09-09 | 1959-03-11 | $7700.00 | Window Closed / Lapsed |