US3378070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyethyl cellulose complex and method of plugging underground formations therewith
Assignee: Halliburton Co
•
Filing: 1965-09-03
•
Granted: 1968-04-16
•
Expires: 1985-09-03
Abstract
No abstract record available.
Inventors
- 👤 Gerald A Wessler
- 👤 Walter N Epler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:00
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/512; Y; Y10; Y10S; Y10S507/00; Y10S507/935
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3058909A
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US2961400A
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US3049433A
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US3251781A
Cited
US3241612A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |