Patent US3287274A successfully refreshed from Google Patents.
US3287274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic brake fluid base
Assignee: Texaco Inc
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Filing: 1963-05-27
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Granted: 1966-11-22
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Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Gayle D Edwards
- 👤 Jr Clifford L Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:03
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/40; C10M2207/402; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/107; C10M2209/108; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
A METHOD FOR PREPARING A BRAKE FLUID SOLVENT WHICH COMPRISES (A) REACTING (A) METHANOL IN THE PRESENCE OF AN ALKOXYLATION CATALYST WITH (B) FROM 1.0 TO 1.6 MOLS OF ETHYLENE OXIDE FOLLOWED BY (C) FROM 0.9 TO 1.4 MOLS OF PROPYLENE OXIDE AT A TEMPERATURE OF 80 TO 160*C. AND A PRESSURE OF UP TO 200 P.S.I.G., (B) NEUTRALIZING THE ALKOXYLATION CATALYST, (C) FILTERING THE MIXTURE SO PRODUCED TO REMOVE INSOLUBLE SALTS, (D) DISTILLING THE FILTRATE TO OBTAIN AN OVERHEAD PRODUCT FRACTION A COMPRISING FROM ABOUT 15 TO ABOUT 22 WT. PERCENT OF SAID FILTRATE AND A FIRST RESIDUE FRACTION HAVING A REFLUX BOILING POINT OF ABOUT 420*F., (E) FURTHER DISTILLING SAID FIRST RESIDUE FRACTION TO OBTAIN AN OVERHEAD PRODUCT FRACTION B FREE OF NONVOLATILE COMPONENTS AND A SECOND RESIDUE FRACTION COMPRISING FROM ABOUT 4 TO ABOUT 10 WT. PERCENT OF SAID FIRST RESIDUE FRACTION, AND (F) BLENDING FROM 0 TO ABOUT 60 WT. PERCENT FRACTION A WITH FROM 100 TO ABOUT 40 WT. PERCENT OF SAID FRACTION B TO OBTAIN THEREBY SAID BRAKE FLUID SOLVENT.
Claim 2
Independent Claim
176 words
A METHOD FOR PREPARING A BRAKE FLUID SOLVENT WHICH COMPRISES (A) REACTING (A) METHANOL IN THE PRESENCE OF AN ALKOXYLATION CATALYST WITH (B) FROM 1.0 TO 1.6 MOLS OF ETHYLENE OXIDE FOLLOWED BY (C) FROM 0.9 TO 1.4 MOLS OF PROPYLENE OXIDE AT A TEMPERATURE OF 80 TO 160*C. AND A PRESSURE OF UP TO 200 P.S.I.G., (B) NEUTRALIZING THE ALKOXYLATION CATALYST, (C) FILTERING THE MIXTURE SO PRODUCED TO REMOVE INSOLUBLE SALTS, (D) DISTILLING THE FILTRATE TO OBTAIN AN OVERHEAD PRODUCT FRACTION A COMPRISING FROM ABOUT 15 TO ABOUT 22 WT. PERCENT OF SAID FILTRATE AND A FIRST RESIDUE FRACTION HAVING A REFLUX BOILING POINT OF ABOUT 420*F., (E) FURTHER DISTILLING SAID FIRST RESIDUE FRACTION TO OBTAIN AN OVERHEAD PRODUCT FRACTION B FREE OF NONVOLATILE COMPONENTS AND A SECOND RESIDUE FRACTION COMPRISING FROM ABOUT 4 TO ABOUT 10 WT. PERCENT OF SAID FIRST RESIDUE FRACTION, AND (F) BLENDING FROM 0 TO ABOUT 60 WT. PERCENT FRACTION A WITH FROM 100 TO ABOUT 40 WT. PERCENT OF SAID FRACTION B TO OBTAIN THEREBY SAID BRAKE FLUID SOLVENT.
Claim 3
Dependent Claim
219 words
A BRAKE FLUID BASE COMPRISING 55 TO 75 WT. PERCENT SOLVENT, 8 TO 22 WT. PERCENT RUBBER SWELL INHIBITOR SELECTED FROM THE CLASS CONSISTING OF PROPYLENE GLYCOL, DIPROPYLENE GLYCOL, ETHYLENE GLYCOL, DIETHYLENE GLYCOL AND HEXYLENE GLYCOL AND 15 TO 25 WT. PERCENT LUBRICANT SELECTED FROM THE CLASS CONSISTING OF CASTOR OIL, AND POLYOXYALKYLENE ETHERS, WHEREIN SAID SOLVENT IS OBTAINED BY (A) REACTING METHANOL WITH 1.0 TO 1.6 MOLS OF ETHYLENE OXIDE FOLLOWED BY 0.9 TO 1.4 MOLS OF PROPYLENE OXIDE IN THE PRESENCE OF AN ALKOXYLATION CATALYST AT A TEMPERATURE OF 80 TO 160*C. AND A PRESSURE OF UP TO 200 P.S.I.G., (B) NEUTRALIZING SAID ALKOXYLATION CATALYST, (C) FILTERING THE MIXTURE TO REMOVE INSOLUBLE SALTS, (D) DISTILLING THE FILTRATE TO OBTAIN AND OVERHEAD PRODUCT FRACTION A COMPRISING FROM ABOUT 15 TO ABOUT 22 WT. PERCENT OF SAID FILTRATE AND A FIRST RESIDUE FRACTION HAVING A REFLUX BOILING POINT OF ABOUT 420*F., (E) FURTHER DISTILLING SAID FIRST RESIDUE FRACTION TO OBTAIN AN OVERHEAD PRODUCT FRACTION B FREE OF NONVOLATILE COMPONENTS AND A SECOND RESIDUE FRACTION COMPRISING FROM ABOUT 4 TO ABOUT 10 WT. PERCENT OF SAID FIRST RESIDUE FRACTION, AND (F) BLENDING FROM 0 TO ABOUT 60 WT. PERCENT OF SAID FRACTION A WITH FROM 100 TO ABOUT 40 WT. PERCENT OF SAID FRACTION B TO OBTAIN THEREBY SAID SOLVENT.
Claim 4
Dependent Claim
219 words
A BRAKE FLUID BASE COMPRISING 55 TO 75 WT. PERCENT SOLVENT, 8 TO 22 WT. PERCENT RUBBER SWELL INHIBITOR SELECTED FROM THE CLASS CONSISTING OF PROPYLENE GLYCOL, DIPROPYLENE GLYCOL, ETHYLENE GLYCOL, DIETHYLENE GLYCOL AND HEXYLENE GLYCOL AND 15 TO 25 WT. PERCENT LUBRICANT SELECTED FROM THE CLASS CONSISTING OF CASTOR OIL, AND POLYOXYALKYLENE ETHERS, WHEREIN SAID SOLVENT IS OBTAINED BY (A) REACTING METHANOL WITH 1.0 TO 1.6 MOLS OF ETHYLENE OXIDE FOLLOWED BY 0.9 TO 1.4 MOLS OF PROPYLENE OXIDE IN THE PRESENCE OF AN ALKOXYLATION CATALYST AT A TEMPERATURE OF 80 TO 160*C. AND A PRESSURE OF UP TO 200 P.S.I.G., (B) NEUTRALIZING SAID ALKOXYLATION CATALYST, (C) FILTERING THE MIXTURE TO REMOVE INSOLUBLE SALTS, (D) DISTILLING THE FILTRATE TO OBTAIN AND OVERHEAD PRODUCT FRACTION A COMPRISING FROM ABOUT 15 TO ABOUT 22 WT. PERCENT OF SAID FILTRATE AND A FIRST RESIDUE FRACTION HAVING A REFLUX BOILING POINT OF ABOUT 420*F., (E) FURTHER DISTILLING SAID FIRST RESIDUE FRACTION TO OBTAIN AN OVERHEAD PRODUCT FRACTION B FREE OF NONVOLATILE COMPONENTS AND A SECOND RESIDUE FRACTION COMPRISING FROM ABOUT 4 TO ABOUT 10 WT. PERCENT OF SAID FIRST RESIDUE FRACTION, AND (F) BLENDING FROM 0 TO ABOUT 60 WT. PERCENT OF SAID FRACTION A WITH FROM 100 TO ABOUT 40 WT. PERCENT OF SAID FRACTION B TO OBTAIN THEREBY SAID SOLVENT.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |