US3072618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonation with organic phosphorous compound-sulfur trioxide adducts
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1959-04-01
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Granted: 1963-01-08
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Expires: 1979-04-01
Abstract
No abstract record available.
Inventors
- 👤 Albin F Turbak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:52
CPC Classifications
C; C01; C01B; C01B25/00; C07; C07B; C07B45/00; C07B45/02; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06; C07C303/24; C07F; C07F7/00; C07F7/28; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/28; C08; C08F; C08F8/00; C08F8/44; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
PROCESS FOR SULFONATING A POLYMER MADE FROM AN ALKARYL AROMATIC COMPOUND COMPRISING CONTACTING SAID POLYMER WITH A SULFONATING COMPLEX AT -40 TO 100*C. FOR FROM A FEW SECONDS TO SEVERAL HOURS, SAID SULFONATING COMPLEX COMPRISING THE REACTION PRODUCT OF ABOUT 2 TO 4 MOLES OF AVAILABLE SULFUR TRIOXIDE AND 1 MOLE OF A LOWER TRIALKYL PHOSPHATE AND RECOVERING A SULFONATED POLYMER.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |