Patent US2694451A successfully refreshed from Google Patents.
US2694451A
Expired / Lapsed
US
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Production packer and retrievable cementing tool
Assignee: Houston Engineers Inc
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Filing: 1952-01-16
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Granted: 1954-11-16
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Expires: 1972-01-16
Abstract
No abstract record available.
Inventors
- 👤 William F Carothers
- 👤 James M Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:17
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2474491A
Cited
US2143746A
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US2189703A
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US2222014A
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US2270648A
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US2361094A
Cited
US2589506A
Cited
US2551240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |