US2921906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic brake fluid
Assignee: Wagner Electric Corp
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Filing: 1956-04-25
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Granted: 1960-01-19
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Expires: 1976-04-25
Abstract
No abstract record available.
Inventors
- 👤 George L Doelling
- 👤 Chester B Swander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:00
CPC Classifications
C; C10; C10M; C10M3/00; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2201/087; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/28; C10M2207/287; C10M2207/289; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10N; C10N2010/00; C10N2010/02; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A HEAVY-DUTY HYDRAULIC BRAKE FLUID CONSISTING ESSENTIALLY OF, PER 100 PARTS BY VOLUME, 50 TO 75 PARTS BY VOLUME OF AT LEAST ONE DILUENT CHOSEN FROM THE GROUP CONSISTING OF METHOXY-BUTANOL AND THE LOWER MONO-ALKYL ETHERS OF DIETHYLENE GLYCOL, SAID ETHERS BEING OF A PURE LOW GRAVITY GRADE HAVING AN ETHYLENE GLYCOL CONTENT OF NOT MORE THAN APPROXIMATELY 3 PERCENT ETHYLENE GLYCOL BY VOLUME, FROM 5 TO 20 PARTS BY VOLUME OF A RICINOLEATE OF GLYCOL, SAID GLYCOL BEING AN ALIPHATIC GLYCOL HAVING NOT OVER FIVE CARBON ATOMS PER MOLECULE, FORM 5 TO 20 PATTS BY VOLUME OF A SUBSTANTIALLY WATER-INSOLUBLE POLYPROPYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 1,000 AND 3,000, FROM 5 TO 25 PARTS BY VOLUME OF AT LEAST ONE GLYCOL CHOSEN FROM THE GROUP CONSISTING OF PROPYLENE GLYCOL, BUTYLENE GLYCOL AND HEXYLENE GLYCOL, SAID POLYPROPYLENE GLYCOL PLUS SAID RICINOLEATE OF A GYCOL FORMING A TOTAL OF AT LEAST APPROXIMATELY 20 PERCENT BY WEIGHT OF THE BRAKE FLUID.
Claim 2
Dependent Claim
161 words
A HEAVY-DUTY HYDRAULIC BRAKE FLUID CONSISTING ESSENTIALLY OF, PER 100 PARTS BY VOLUME, 50 TO 75 PARTS BY VOLUME OF AT LEAST ONE DILUENT CHOSEN FROM THE GROUP CONSISTING OF METHOXY-BUTANOL AND THE LOWER MONO-ALKYL ETHERS OF DIETHYLENE GLYCOL, SAID ETHERS BEING OF A PURE LOW GRAVITY GRADE HAVING AN ETHYLENE GLYCOL CONTENT OF NOT MORE THAN APPROXIMATELY 3 PERCENT ETHYLENE GLYCOL BY VOLUME, FROM 5 TO 20 PARTS BY VOLUME OF A RICINOLEATE OF GLYCOL, SAID GLYCOL BEING AN ALIPHATIC GLYCOL HAVING NOT OVER FIVE CARBON ATOMS PER MOLECULE, FORM 5 TO 20 PATTS BY VOLUME OF A SUBSTANTIALLY WATER-INSOLUBLE POLYPROPYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 1,000 AND 3,000, FROM 5 TO 25 PARTS BY VOLUME OF AT LEAST ONE GLYCOL CHOSEN FROM THE GROUP CONSISTING OF PROPYLENE GLYCOL, BUTYLENE GLYCOL AND HEXYLENE GLYCOL, SAID POLYPROPYLENE GLYCOL PLUS SAID RICINOLEATE OF A GYCOL FORMING A TOTAL OF AT LEAST APPROXIMATELY 20 PERCENT BY WEIGHT OF THE BRAKE 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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |