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US2698057A
Expired / Lapsed
US
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Down-hole casing spray gun
Assignee: PHILLIPS PETROLCUM Co
•
Filing: 1951-11-05
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Granted: 1954-12-28
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Expires: 1971-11-05
Abstract
No abstract record available.
Inventors
- 👤 Harold S Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:13
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; Y; Y10; Y10S; Y10S166/00; Y10S166/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1449672A
Cited
US1959660A
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US2207478A
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US2170355A
Cited
US2235318A
Cited
US2387002A
Cited
US2526021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |