US2809209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing mahogany sulfonates
Assignee: Bray Oil Co
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Filing: 1955-11-22
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Granted: 1957-10-08
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Expires: 1975-11-22
Abstract
No abstract record available.
Inventors
- 👤 Voorhees Vanderveer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:38
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE PROCESS OF MAKING PURIFIED MAHOGANY SULFONATES SUBSTANTIALLY FREE OF SULFATES WHICH COMPRISES FORMING A SOLUTION OF CRUDE MAHOGANY SULFONIC ACID CONTAMINATED WITH SULFURIC ACID, IN A VOLATILE SOLVENT SELECTED FROM THE CLASS CONSISTING OF HYDROCARBONS AND CHLORINATED DERIVATIVES, THEREOF, MIXING THE SAID SOLUTION WITH A SOLUTION OF WATER, AN ALCOHOL OF 1 TO 3 CARBON ATOMS AND HYDROCHLORIC ACID, SEPARATING THE MIXTURE INTO TWO PHASES AN OIL-SULFONIC ACID-SOLVENT PHASE AND AN AQUEOUS PHASE CONTAINING SULFURIC ACID AND WATER SOLUBLE IMPURITIES, NEUTRALIZING THE OIL-SULFONIC ACID-SOLUBLE PHASE WITH A BASW, FORMING A DISIRED SULFONATE OF SAID BASE, THEN DISTILLING WATER AND SOLVENT FROM SAID SULFONATE.
Claim 2
Dependent Claim
104 words
THE PROCESS OF MAKING PURIFIED MAHOGANY SULFONATES SUBSTANTIALLY FREE OF SULFATES WHICH COMPRISES FORMING A SOLUTION OF CRUDE MAHOGANY SULFONIC ACID CONTAMINATED WITH SULFURIC ACID, IN A VOLATILE SOLVENT SELECTED FROM THE CLASS CONSISTING OF HYDROCARBONS AND CHLORINATED DERIVATIVES, THEREOF, MIXING THE SAID SOLUTION WITH A SOLUTION OF WATER, AN ALCOHOL OF 1 TO 3 CARBON ATOMS AND HYDROCHLORIC ACID, SEPARATING THE MIXTURE INTO TWO PHASES AN OIL-SULFONIC ACID-SOLVENT PHASE AND AN AQUEOUS PHASE CONTAINING SULFURIC ACID AND WATER SOLUBLE IMPURITIES, NEUTRALIZING THE OIL-SULFONIC ACID-SOLUBLE PHASE WITH A BASW, FORMING A DISIRED SULFONATE OF SAID BASE, THEN DISTILLING WATER AND SOLVENT FROM SAID SULFONATE.
References Cited (Backward Citations)
US2530757A
Cited
US2509863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |