US3049491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well drilling fluids
Assignee: Crossett Chemical Co
•
Filing: 1959-08-27
•
Granted: 1962-08-14
•
Expires: 1979-08-27
Abstract
No abstract record available.
Inventors
- 👤 James E Donham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:03
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A DRILLING FLUID CONSISTING ESSENTIALLY OF FRESH WATER, CLAY AND "FLOATING SOAP," AND "FLOATING SOAPC8 BEING PRESENT IN AMOUNTS OF FROM ABOUT 0.04 TO ABOUT 0.2K% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE DRILLING FLUID SUFFICIENT TO IMPART EXTREME PRESSURE LUBRICATING QUALITIES TO THE DRILLING FLUID.
Claim 2
Dependent Claim
48 words
A DRILLING FLUID CONSISTING ESSENTIALLY OF FRESH WATER, CLAY AND "FLOATING SOAP," AND "FLOATING SOAPC8 BEING PRESENT IN AMOUNTS OF FROM ABOUT 0.04 TO ABOUT 0.2K% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE DRILLING FLUID SUFFICIENT TO IMPART EXTREME PRESSURE LUBRICATING QUALITIES TO THE DRILLING FLUID.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |