Patent US2482616A successfully refreshed from Google Patents.
US2482616A
Expired / Lapsed
US
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Installation for well control equipment
Assignee: Shell Development Co
•
Filing: 1945-11-07
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Granted: 1949-09-20
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Expires: 1965-11-07
Abstract
No abstract record available.
Inventors
- 👤 James N Gregory
- 👤 Lewie W Elder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:49
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US134453A
Cited
US1098107A
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US1586923A
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US1547311A
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US2241333A
Cited
US2180680A
Cited
US2258001A
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US2346060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-19 | 1953-03-21 | 1953-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-19 | 1957-03-21 | 1957-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-19 | 1961-03-21 | 1961-09-20 | $7700.00 | Window Closed / Lapsed |