US3385793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroviscous fluid and method of using same
Assignee: Union Oil Company of California
•
Filing: 1965-03-19
•
Granted: 1968-05-28
•
Expires: 1985-03-19
Abstract
No abstract record available.
Inventors
- 👤 Donald L Klass
- 👤 Brozowski Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:51
CPC Classifications
F; F16; F16D; F16D37/00; F16D37/02; C; C10; C10M; C10M171/00; C10M171/001; Y; Y10; Y10S; Y10S60/00; Y10S60/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A FIELD-SENSITIVE CHUCKING FLUID CONSISTING ESSENTIALLY OF ABOUT 30% BY WEIGHT OF WHITE OIL, ABOUT 50% BY WEIGHT OF SILICA HAVING A PARTICLE SIZE LESS THAN ABOUT 10 MICRONS, ABOUT 5% BY WEIGHT OF ETHYLENE GLYCOL, AND ABOUT 13.5% BY WEIGHT OF 1-HYDROXYETHYL-2-HEPTADECENYL-IMIDAZOLINE, TO WHICH IS ADDED 1 TO 40% BY WEIGHT BASED ON THE WEIGHT OF THE AFORENAMED COMPONENTS OF A PARTICULATE CONDUCTIVE METAL HAVING A PARTICLE SIZE OF LESS THAN ABOUT 30 MICRONS.
Claim 2
Dependent Claim
75 words
A FIELD-SENSITIVE CHUCKING FLUID CONSISTING ESSENTIALLY OF ABOUT 30% BY WEIGHT OF WHITE OIL, ABOUT 50% BY WEIGHT OF SILICA HAVING A PARTICLE SIZE LESS THAN ABOUT 10 MICRONS, ABOUT 5% BY WEIGHT OF ETHYLENE GLYCOL, AND ABOUT 13.5% BY WEIGHT OF 1-HYDROXYETHYL-2-HEPTADECENYL-IMIDAZOLINE, TO WHICH IS ADDED 1 TO 40% BY WEIGHT BASED ON THE WEIGHT OF THE AFORENAMED COMPONENTS OF A PARTICULATE CONDUCTIVE METAL HAVING A PARTICLE SIZE OF LESS THAN ABOUT 30 MICRONS.
References Cited (Backward Citations)
US2886151A
Cited
US3047507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |