US3406115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of lessening friction in moving oil-base liquids
Assignee: Schlumberger Technology Corp
•
Filing: 1965-04-02
•
Granted: 1968-10-15
•
Expires: 1985-04-02
Abstract
No abstract record available.
Inventors
- 👤 Jerry L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:54
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; Y; Y10; Y10S; Y10S507/00; Y10S507/91; Y10S507/922; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2492173A
Cited
US2599553A
Cited
US2768138A
Cited
US2851417A
Cited
US2764546A
Cited
US3105047A
Cited
US3168475A
Cited
US3215154A
Cited
US3102548A
Cited
US3254719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |