US3457155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing sulfonic acids
Assignee: Hoechst AG
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Filing: 1966-04-28
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Granted: 1969-07-22
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Expires: 1986-04-28
Abstract
No abstract record available.
Inventors
- 👤 Sigurd Rosinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:07
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/14; B; B01; B01J; B01J19/00; B01J19/08; B01J19/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR PREPARING ALIPHATIC AND CYCLOALIPHATIC SULFONIC ACIDS BY REACTING ALIPHATIC AND CYCLOALIPHATIC HYDROCARBONS CONTAINING 10 TO 30 CARBON ATOMS WITH SULFUR DIOXIDE AND OXYGEN, WHICH COMPRISES INITIATING THE REACTION BY THE ACTION OF HIGH ENERGY IONIZING RADIATION ON THE GAS MIXTURE OF SULFUR DIOXIDE AND OXYGEN AND REACTING THE GAS MIXTURE ACTIVATED IN THIS MANNER WITH THE ALIPHATIC REACTANT WITHOUT FURTHER EXPOSURE TO RADIATION.
Claim 2
Dependent Claim
66 words
A PROCESS FOR PREPARING ALIPHATIC AND CYCLOALIPHATIC SULFONIC ACIDS BY REACTING ALIPHATIC AND CYCLOALIPHATIC HYDROCARBONS CONTAINING 10 TO 30 CARBON ATOMS WITH SULFUR DIOXIDE AND OXYGEN, WHICH COMPRISES INITIATING THE REACTION BY THE ACTION OF HIGH ENERGY IONIZING RADIATION ON THE GAS MIXTURE OF SULFUR DIOXIDE AND OXYGEN AND REACTING THE GAS MIXTURE ACTIVATED IN THIS MANNER WITH THE ALIPHATIC REACTANT WITHOUT FURTHER EXPOSURE TO RADIATION.
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |