US2678906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anhydrous surface-active solutions
Assignee: California Spray Chemical Corp
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Filing: 1950-08-07
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Granted: 1954-05-18
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Expires: 1970-08-07
Abstract
No abstract record available.
Inventors
- 👤 Gustave K Kohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:26
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE PREPARATION OF A STABLE, LIQUID SOLUTION OF A SURFACE-ACTIVE SALT OF A HEXAVALENT OXY-ACID OF SULFUR IN A H20-IMMISCIBLE AROMATIC SOLVENT WHICH COMPRISES SUBJECTING AN AQUEOUS DISPERSION OF A SURFACE-ACTIVE SALT OF AN ORGANIC HEXAVALENT OXY-ACID A SULFUR CONTAINING AN INORGANIC SULFATE IN AMOUNTS LESS THAN ABOUT 15% BY WEIGHT BASED ON SAID SURFACE-ACTIVE SALT, TO CONDITIONS OF CO-DISTILLATION AT ATMOSPHERIC PRESSURE WITH A HIGH-BOILING, H20-IMMISCIBLE AROMATIC SOLVENT WHICH IS CAPABLE OF CO-DISTILLING WITH WATER AT TEMPERATURES OF AT LEAST 120* C. AND MAINTAINING SAID DISTILLATION TO A LIQUID TEMPERATURE OF AT LEAST 120* C. UNTIL THE RESULTING SOLUTION OF SAID SURFACE-ACTIVE SALT IS SUBSTANTIALLY ANHYDROUS.
Claim 2
Dependent Claim
107 words
THE PREPARATION OF A STABLE, LIQUID SOLUTION OF A SURFACE-ACTIVE SALT OF A HEXAVALENT OXY-ACID OF SULFUR IN A H20-IMMISCIBLE AROMATIC SOLVENT WHICH COMPRISES SUBJECTING AN AQUEOUS DISPERSION OF A SURFACE-ACTIVE SALT OF AN ORGANIC HEXAVALENT OXY-ACID A SULFUR CONTAINING AN INORGANIC SULFATE IN AMOUNTS LESS THAN ABOUT 15% BY WEIGHT BASED ON SAID SURFACE-ACTIVE SALT, TO CONDITIONS OF CO-DISTILLATION AT ATMOSPHERIC PRESSURE WITH A HIGH-BOILING, H20-IMMISCIBLE AROMATIC SOLVENT WHICH IS CAPABLE OF CO-DISTILLING WITH WATER AT TEMPERATURES OF AT LEAST 120* C. AND MAINTAINING SAID DISTILLATION TO A LIQUID TEMPERATURE OF AT LEAST 120* C. UNTIL THE RESULTING SOLUTION OF SAID SURFACE-ACTIVE SALT IS SUBSTANTIALLY ANHYDROUS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |