Patent US2784677A successfully refreshed from Google Patents.
US2784677A
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Gas anchor
Assignee: ExxonMobil Oil Corp
•
Filing: 1953-08-17
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Granted: 1957-03-12
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Expires: 1973-08-17
Abstract
No abstract record available.
Inventors
- 👤 Paul P Reichertz
- 👤 Carl R Sandberg
- 👤 Jr Carl A Connally
- 👤 Terence A Pollard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:24
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; E21B43/38; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2234977A
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US2346602A
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US2523091A
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US2528448A
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US2439468A
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US2506790A
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US2525897A
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US2665644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |