US2677427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable injecting device
Assignee: Shell Development Co
•
Filing: 1951-02-06
•
Granted: 1954-05-04
•
Expires: 1971-02-06
Abstract
No abstract record available.
Inventors
- 👤 Howard E Mckinney
- 👤 Douglas E Broussard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:17
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/068; E21B33/072
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1630826A
Cited
US1817201A
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US2069087A
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US2218955A
Cited
US2226060A
Cited
US2265736A
Cited
US2567009A
Cited
US2630180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |