US3207781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sodium cyclohexylsulfamate free of sulfates
Assignee: Abbott Laboratories
•
Filing: 1963-06-17
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Granted: 1965-09-21
•
Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Shah Vipin Dhirajlal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:30
CPC Classifications
C; C07; C07C; C07C307/00; C07C307/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE PROCESS OF REMOVING SUBSTANTIALLY ALL SODIUM SULFATE FROM AN AQUEOUS MIXTURE OF SODIUM CYCLOHEXYLSULFAMATE SODIUM SULFATE, COMPRISING ADDING SUFFICIENT NAOH TO PRODUCT AN AQUEOUS PHASE CONTAINING BETWEEN 10 AND 18 GRAMS OF FREE NAOH PER 100 ML., FILTERING THE PRECIPITATED SODIUM CYCLOHEXYLSULFAMATE FROM THE FORMED SLURRY AT A TEMPERATURE BETWEEN 0* AND 30*C., AND WASHING THE PRECIPITATE WITH 10-20 PARTS BY VOLUME OF WATER PER 100 PARTS BY WEIGHT OF SAID PRECIPITATE.
Claim 2
Dependent Claim
73 words
THE PROCESS OF REMOVING SUBSTANTIALLY ALL SODIUM SULFATE FROM AN AQUEOUS MIXTURE OF SODIUM CYCLOHEXYLSULFAMATE SODIUM SULFATE, COMPRISING ADDING SUFFICIENT NAOH TO PRODUCT AN AQUEOUS PHASE CONTAINING BETWEEN 10 AND 18 GRAMS OF FREE NAOH PER 100 ML., FILTERING THE PRECIPITATED SODIUM CYCLOHEXYLSULFAMATE FROM THE FORMED SLURRY AT A TEMPERATURE BETWEEN 0* AND 30*C., AND WASHING THE PRECIPITATE WITH 10-20 PARTS BY VOLUME OF WATER PER 100 PARTS BY WEIGHT OF SAID PRECIPITATE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |