Patent US3455386A successfully refreshed from Google Patents.
US3455386A
Expired / Lapsed
US
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Secondary recovery method using non-ionic surfactant mixtures
Assignee: Shell USA Inc
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Filing: 1967-07-13
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Granted: 1969-07-15
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Expires: 1987-07-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph Reisberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:33
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936; Y10S507/937; Y10S507/938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3082822A
Cited
US3163214A
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US3297084A
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US3275075A
Cited
US3254714A
Cited
US3307628A
Cited
US3401748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |