Patent US2906980A successfully refreshed from Google Patents.
Patent US3417820A successfully refreshed from Google Patents.
US3417820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well treating with aqueous gelled salt solutions
Assignee: Halliburton Co
•
Filing: 1965-08-27
•
Granted: 1968-12-24
•
Expires: 1985-08-27
Abstract
No abstract record available.
Inventors
- 👤 Walter N Epler
- 👤 William T Malone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:37
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; C; C09; C09K; C09K8/00; C09K8/60; C09K8/62
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2570947A
Cited
US2681704A
Cited
US2778427A
Cited
US2801218A
Cited
US2961400A
Cited
US3024191A
Cited
US3167510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |