US2771484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonation of organic hydroxy compounds
Assignee: Henkel AG and Co KGaA
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Filing: 1953-09-14
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Granted: 1956-11-20
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Expires: 1973-09-14
Abstract
No abstract record available.
Inventors
- 👤 Blaser Bruno
- 👤 Tischbirek Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:10
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/24; C07B; C07B45/00; C07B45/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
PROCESS FOR THE SULFONATION OF ORGANIC HYDROXY COMPOUNDS, THE HYDROXY GROUPS BEING LOCATED AT NON-AROMATIC CARBON ATOMS WHICH COMPRISES INTIMATELY CONTACTING SAID HYDROXY COMPOUNDS WITH A POLYETHER CHLOROSULFONIC ACID ADDITION COMPOUND CONTAINING INDIVIDUAL CHLOROSULFONIC ACID MOLECULES MOLECULARLY BOUND TO AT LEAST 3 ETHER OXYGEN ATOMS PRESENT IN THE POLYETHER AND RECOVERING A SULFONATED ORGANIC HYDROXY COMPOUND.
Claim 2
Dependent Claim
56 words
PROCESS FOR THE SULFONATION OF ORGANIC HYDROXY COMPOUNDS, THE HYDROXY GROUPS BEING LOCATED AT NON-AROMATIC CARBON ATOMS WHICH COMPRISES INTIMATELY CONTACTING SAID HYDROXY COMPOUNDS WITH A POLYETHER CHLOROSULFONIC ACID ADDITION COMPOUND CONTAINING INDIVIDUAL CHLOROSULFONIC ACID MOLECULES MOLECULARLY BOUND TO AT LEAST 3 ETHER OXYGEN ATOMS PRESENT IN THE POLYETHER AND RECOVERING A SULFONATED ORGANIC HYDROXY COMPOUND.
References Cited (Backward Citations)
US1931491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |