US3158583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulphonation of cross-linked vinylbenzene polymers
Assignee: Bayer AG
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Filing: 1961-01-11
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Granted: 1964-11-24
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Expires: 1981-01-11
Abstract
No abstract record available.
Inventors
- 👤 Corte Herbert
- 👤 Netz Otto
- 👤 Seifert Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
PROCESS FOR SULPHONATING CROSS-LINKED POLYMERS OF MONOVINYLBENZENE HYDROCARBONS WHICH COMPRISES CONTACTING SAID CROSS-LINKED POLYMERS WITH A SULPHONATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLOROSULPHONIC ACID AND CONCENTRATED SULPHURIC ACID AT A TEMPERATURE RANGE OF ABOUT 0-150*C. FOR CHLORSULPHONIC ACID AND OF ABOUT 80-150*C. FOR CONCENTRATED SULPHURIC ACID TO OBTAIN SULPHONATED PRODUCTS CONTAINING ABOUT 0.7 TO 1 SULPHONIC ACID GROUP PER BENZENE NUCLEUS, CONTACTING SAID SULPHONATED PRODUCT AT A TEMPERATURE RANGE OF ABOUT 50-120*C. WITH OLEUM CONTAINING FROM ABOUT 10 TO 70% BY WEIGHT OF FREE SO3, TO OBTAIN A FINAL SULPHONATED PRODUCT CONTAINING 1.5 TO 2 SULPHONIC ACID GROUPS PER AROMATIC NUCLEUS.
Claim 2
Dependent Claim
103 words
PROCESS FOR SULPHONATING CROSS-LINKED POLYMERS OF MONOVINYLBENZENE HYDROCARBONS WHICH COMPRISES CONTACTING SAID CROSS-LINKED POLYMERS WITH A SULPHONATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLOROSULPHONIC ACID AND CONCENTRATED SULPHURIC ACID AT A TEMPERATURE RANGE OF ABOUT 0-150*C. FOR CHLORSULPHONIC ACID AND OF ABOUT 80-150*C. FOR CONCENTRATED SULPHURIC ACID TO OBTAIN SULPHONATED PRODUCTS CONTAINING ABOUT 0.7 TO 1 SULPHONIC ACID GROUP PER BENZENE NUCLEUS, CONTACTING SAID SULPHONATED PRODUCT AT A TEMPERATURE RANGE OF ABOUT 50-120*C. WITH OLEUM CONTAINING FROM ABOUT 10 TO 70% BY WEIGHT OF FREE SO3, TO OBTAIN A FINAL SULPHONATED PRODUCT CONTAINING 1.5 TO 2 SULPHONIC ACID GROUPS PER AROMATIC NUCLEUS.
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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |